If the surveillance cameras, some or all of them, suddenly stop working, showing video loss or signal loss on the monitor or screen intermittently, then you might find this article rather helpful.

We look into common reasons for video loss problem on CCTV security cameras and systems, DVRs camera systems, and provide tips to fix CCTV security camera video loss.


*Take a quick look at this infographic to find the quick fixes for video loss on security cameras, or continue reading if you want to learn more detailed steps.

Quick Fixes for Video Loss on Security Cameras

What's Video Loss on Security Cameras

Video loss on security cameras comes in different forms and shapes.
For instance, a CCTV surveillance system loses video feeds on one or all cameras, displaying video loss at the same time.

CCTV camera gets a loose connection, goes black at night, or gets no video with surveillance camera showing a black screen.

Sometimes, the camera video flickers on and off, showing lines on the screen and monitor. Or the H.264 DVR gets no picture, camera not working and etc.

If you have encountered other problems when using security cameras, check out these posts for feasible solutions:

#1. Security Cameras Won't Work: Top 10 Quick Fixes

#2. IP Camera WiFi Issues: Top 9 Tips

WAIT! Check out these Special Deals before you leave:

Right now, you can get EXCLUSIVE & BIG discounts on a wide range of Reolink security cameras & systems, wire-free & plugged-in, indoors & outdoors.

Why Does Camera Video Loss Happen

We have heard many users complaining about video loss problems on Swann Pro series CCTV cameras, Night Owl cameras, Zmodo cameras, Lorex surveillance camera, Amcrest camera or other cameras, Qsee cameras or CCTV/IP cameras of other brands.

Video Loss on Security Cameras

So why does video loss happen?

In general, the issue of "video loss" on CCTV security cameras or DVR/NVR, in many cases, comes down to several factors: insufficient power supply, unstable network, wiring problems, hardware (cameras, NVR/DVR or monitor) failures, inefficient camera software and IP address conflicts.

Security Cameras Video Loss – Possible Reasons & Troubleshooting

Many users tried and used different ways to solve the video loss but in no luck. Today we share some of the best practices to deal with security camera video loss.

Video Loss Reason 1: Insufficient Power Supply

The insufficient power supply is, very often, the culprit of the video loss on one or all security cameras, CCTV video loss at night, video signal loss on screen, camera going black at night, or camera video flickering on and off.

Security Camera Video Loss

Here are some common reasons for insufficient power supply to CCTV cameras:

• Loose cable connection

• PoE switch or PoE injector

• Cable is too long, or one cable is supplying too many cameras at once

• Faulty power cables (old, damaged, degraded or cut)

Loose cable connection, for example, between DVR/NVR with cameras, between CCTV cameras and monitor or screen, power adapter, or any possible loose connection in camera power supply could cause video loss.

Quick Fixes:

Double-check all power connections, power splitters, cable connectors, and etc. to exclude connection issues. Switch ports to make sure the DVR/NVR port is providing power to the cameras.

Connect the IP cameras directly to the NVR (if there is any) instead of via a PoE switch because the PoE switch could potentially not supply insufficient power to the IP cameras.

Especially the PTZ IP cameras or night vision IR security cameras, which draw more electricity than those don't come with PTZ or night vision (click here to learn more about security camera power consumption).

If PoE switches or PoE injectors are necessary, make sure you choose PoE switches or injectors properly.

Besides, try using shorter BNC or Ethernet cables to power surveillance cameras system and avoid using low-quality extension cables or extension cords.

If you are using battery-powered security cameras, for instance, Reolink Argus 2 and Reolink Go, make sure the battery is not dead or charged either via power adapter or solar panel.

Reolink Argus 2 Solar Panel

Video Loss Reason 2: Power Spike & Interference

Another horrendous hazard is power spike. 

It is likely to cause sudden video loss on security cameras, all CCTV cameras black screen, a camera with the electrified surface, the camera with a vertical/horizontal line, or serious damage to the camera circuit board or other components.

Here are some common reasons for power spike & interference:

• Mounting security camera to a metal/conductive surface

• Lightning strikes

• Strong electrical currents interference from nearby electrical equipment

Quick Fixes:

To resolve such issue, try using power surge protectors or lightning surge protectors to protect your CCTV cameras from a lightning strike.

UPS (Uninterruptible Power Supplies) units will ensure power supply for all cameras when there is a power outage, mitigating concerns for camera power-off.

Besides, if it's hard not to mount your camera to anything other than a metal/conductive surface, add a block of wood in between.

Video Loss Reason 3: Weak WiFi Connection or Low Bandwidth

Video loss or weak video signal among WiFi security cameras and systems could be caused by unstable network connections, weak WiFi connection or low internet bandwidth.

Here are common reasons for network-induced video loss:

• Long distances between wireless security cameras and home routers

• Too many barriers between your camera & WiFi router

WiFi signal interruption & interference

• Insufficient bandwidth via PoE switch or NVR

• The loose connection between BNC connector and security cameras or H.264 DVR

BNC connector, which is commonly used on thin Ethernet network cables and network cards to transmit signals, however, unexpectedly and frequently, explains the constant signal loss and video loss on PoE home surveillance cameras or H.264 DVR.

Bandwidth Causes Video Loss

Some users set up their home surveillance system by connecting the cameras to multiple PoE switches before connecting it to the NVR or other network storage like NAS.

In such cases, video loss or camera not recording is likely to occur due to the bandwidth and network traffic.

In addition, a PoE switch or injector, if being loose or cut, also results in signal transmission disruption and video loss in the process.

If you happen to have wireless security cameras installed, camera video loss displaying during live view could be the result of WiFi signal interruption, be it as a signal drop or signal loss.

Once the wireless cameras' connection with video recorders was severed, it's impossible to upload or stream video feed on any devices.

Quick Fixes:

Check home routers and PoE switches and get your security cameras closer to your home router.

Reconnect BNC connector and unplug PoE switch or injector to troubleshoot the video loss on analog and IP PoE security cameras.

For wireless security cameras, it's advised to examine network and possible network interruption by checking router and channels (click here to learn how to boost WiFi signals).

If you are using cellular security cameras like Reolink Go, make sure the SIM card is properly inserted, not loose, or the data is not maxed out.

Sim Card Surveillance Cameras

Video Loss Reason 4: IR Cut Filter & Faulty IR Night Vision

Some users experience CCTV camera black screen or video going black at night, it's likely that the camera lacks infrared night vision, or the IR night vision camera doesn't have an IR cut filter or a faulty IR sensor, or you simply forget to turn the IR on.

IR Night Vision Security Camera
Quick Fixes:

Check camera settings to make sure the IR is on. To see if the IR LEDs are working, bring in the camera and put them in a low-light environment to see if the IR LEDs is on.

If your outdoor security cameras don't come with IR night vision or defective IR LEDs, use external IR illuminators or floodlight when necessary.

Video Loss Reason 5: Signal Type & Compatibility

Sometimes, your DVR or NVR shows video loss or no video, it's possible that your NVR/DVR is not capable of decoding the video stream, especially when you apply security cameras from different brands.

Or cameras with a higher resolution like 5MP or 4MP can't be decoded or compatible with NVRs/DVRs that are designed to decode 1080p camera.

In some rare cases, the DVR is not able to understand a signal type that the CCTV camera is using, especially among some old CCTV cameras.

Quick Fixes:

Consult the support team of security camera brands on the technical details.

Make sure to eliminate all possible hiccups before returning them for good since many problems will resolve itself if giving them time, and give yourself some time as well before throwing them away.

Remember to use the same brand of NVR/DVR and cameras and make sure the DVR/NVR is able to decode the video stream.

Video Loss Reason 6: Problems in Cables or Wires

BNC Cables or Ethernet network cables, to some extent, could have an impact on the functionality of surveillance cameras, especially analog CCTV cameras which could suffer a greater risk of video loss or signal loss than PoE cameras.

In such a context, hardwired surveillance cameras will be more likely to encounter with wiring-related glitches, such as video loss on analog CCTV cameras and PoE security cameras.

Twisted or bent cables particularly link to signal loss or weak signal passing through to the hub. In some common cases, video feed loss or failures in video streaming will occur.

IP Camera Wire
Quick Fixes:

Check the wiring around your house and every inch of them until you are 100% sure about all wires are firmly connected and fine without any degradation or impairment.

Examine all cables, especially cables through crawl space or attic, to see if the cable is chewed, bent, cut or damaged.

Try powering the CCTV cameras or IP cameras with new cables if necessary.

Video Loss Reason 7: Hardware & Firmware Problem

If you rule out power disruption, connection problems, BNC connector, or cable issue, but still fail to get the bottom of video loss on the cameras, it may be, just maybe comes down to the very fact that your NVR/DVR or surveillance cameras are in a shabby state.

Video Loss Hardware Problem

Sometimes, video loss problem could also happen because of the old or bug-ridden firmware that has been upsetting your nerves all along.

The possible solution would be to have a quick check on the update info and consider a firmware update to get better performance but not with certainty.

Quick Fixes:

Some users suggest updating firmware does help resolve this problem. Caution is warranted before updating and thorough understanding of the update is needed.

When the CCTV cameras, NVRs, or H.264 DVRs go wrong and constantly suffer from video loss, black screen, or no video, it's time to buy new and quality security cameras and systems.

Video Loss Reason 8: IP Address Conflicts

If you can't solve video loss on security cameras even after checking the power supply and network connection, it is possible that there are IP address conflicts that stop you from viewing the security cameras.

Quick Fixes:

Examine the IP address of your security cameras in Client or third-party viewers to see if there are any conflicts, for example, duplicated IP address.

Follow this detailed tutorial to set up IP camera local and remote viewing with the right IP addresses.

Quality & Reliable Security Cameras & Systems Recommendation

Reliable camera system goes a long way to giving you real peace of mind.

Low-quality products will constantly experience problems in image, videos, NVR and tons of other problems, while high-quality and trusted video surveillance cameras system not only provide you with reliable products but also long-term stability and reassurance.

Wire-Free Solar-Powered 4G Security Camera – Reolink Go

Reolink Go connects to the nationwide 4G/3G cellular mobile network instead of WiFi, which is very often the cause of video loss or signal loss problem.

For locations that WiFi or bandwidth network is not available, this wire-free 4G-LTE camera is a perfect solution, reducing hassles of video loss, running wires, weak signals, or black-out.

Thanks to Reolink Cloud Storage, the motion footage or important details are securely stored in the cloud.

The video sample below is recorded by this 4G cellular solar-powered camera in an off-grid stable.

Reolink Go

100% Wire-Free 3G/4G LTE Mobile Camera

No WiFi & Power Needed; Rechargeable Battery or Solar Powered; 1080p Full HD; Starlight Night Vision; 2-Way Audio; Live View Anytime Anywhere.

If you prefer WiFi battery-powered security cameras, take a look at Reolink Argus 2.

Reolink Argus 2

100% Wire-Free Starlight Camera

Rechargeable Battery & Solar Powered; Outdoor/Indoor Protection; 1080 Full HD; Starlight Night Vision; 2-Way Audio; Live View Anytime Anywhere.

Reliable Dual-Band WiFi Security Cameras – RLC-410W

If you want to get rid of security camera WiFi interference problem, go for dual-band WiFi security cameras like Reolink RLC-410W.

Such wireless security cameras are able to work with two WiFi channels, 2.4 and 5 GHz, which ensures their performance when one frequency band is crowded or there is signal interference.

Check how this dual-band WiFi security camera performs in the snow:

Reolink RLC-410W

Dual-Band Wireless Security Camera with Audio

5MP/4MP Super HD, Outdoor/Indoor Protection, Dual-Band WiFi 2.4 GHz and 5 GHz, Audio Recording, and SD Card Storage.

Best PoE Outdoor Security Camera System – RLK8-410B4

The PoE security system Reolink RLK8-410B4 allows you to record videos via 4 PoE IP RLC-410 cameras and store them to an 8-channel NVR. Also, all data transmission of this system is done via Ethernet cables, simple and stable.

This security system can record and store video footage to the NVR when there is no Internet available, which makes it popular with users looking for a reliable and complete security system.

This video footage, recorded by this outdoor security system, shows the whole process of car vandalism in the middle of the night.

Reolink RLK8-410B4

8-Channel PoE Security System

4 pcs 5MP/4MP Security Cameras; 2TB HDD 8-Channel NVR for 24/7 Reliable Recording; Plug & Play; 2 Network Solutions.

How to Avoid Video Loss on Security Cameras and CCTV Cameras

Video loss occurs in various circumstances and forms such as video loss on all cameras, video loss on one CCTV camera, camera video going black at night, CCTV no video signal, camera with black screen, cameras stopping recording, cameras going on and off, camera not working or cameras showing vertical or horizontal lines.

To avoid such hassles in the first place, it's always advised to regularly check your security camera system and take some necessary precautions to stomp out video loss on CCTV cameras and home security camera.

1: Check All Possible Connection Regularly

Echoing what we have discussed earlier about possible reasons for video loss, you should conduct a thorough examination of all power and network connection regularly, such as power cord, power adapter, Ethernet cable, BNC connector, BNC cable and so on to make sure they are well attached and functioning.

2: Use Original and Shorter Cables

Word of advice, try to use shorter BNC or Ethernet cables to power surveillance cameras system; and don't easily switch original cables to other non-professional grade cables, or avoid using low-quality extension cables or extension cords.

3: Use Power Surge Protector and UPS

Lightning surge protectors will stop voltage spikes and surges by blocking voltage levels exceeding specific thresholds and channeling extra voltage into the outlet's ground line.

UPS units will ensure power supply for all cameras when experiencing a power outage, mitigating concerns for camera power-off.

4: Choose Reliable Cameras System Brands

Expensive products don't necessarily come with solid products, but well-received security camera brands among customers could signal that the products are up to scratch.

Helpful and responsive teams within the corporation no doubt help customers troubleshoot problems in their camera system in a timely and effective manner.

Meanwhile, try buying security cameras and DVR/NVR from same manufacturers to avoid compatibility issue.


  • John Mulvihill

    I purchased an ANT NVR. Great S/W with lots of options on the NVR box; However, it would lock up, or lose the video streams momentarily.
    I went higher dollar, and purchased a unit that would do 8ch of 5M, thinking that bandwidth of the NVR was the issue, since I have two 5M Dome cameras. Low and behold, the more expensive unit with higher bandwidth does it too! I log into the camera browser and no issue. I use my laptop and UC software and no issue, just NVR boxes don't hold sync. Stink!
    Any clue how to get cooperation between the NVR and the 5M dome cameras?

    • Hi John, given what you described in your scenario, it would be a good idea to reboot your NVR first before trying to reconnect them. And it is also a good idea to plug in another PoE port and see if the port is poorly connected with your cameras.

      Besides, if your cameras and NVR are running on old version of firmware, it's better to update camera firmware and NVR firmware to fix some tiny bugs that might result in constant video loss. If your cameras and NVR are powered over Ethernet, internet bandwidth won't be a issue. It is important that NVRs are compatible with the cameras.

      Try some of tips listed on the article or try to contact their tech support for more information.

      • John Mulvihill

        Thanks for the quick response, as it turns out, the problem was a lack of bandwidth. I resolved to make a direct connection from my router to my recorder and the problem went away.

        • Great! It's important to make sure camera/recorder and router is directly connected. And we are happy we could be helpful in some ways.

  • rosellebargo

    My company installed 105 cameras which have 7 nvr. The 6 nvr have 16 cameras each while the other one have 9 cameras. There is video loss in the 7th nvr which consist of 9 cameras. My workmate tried to switch the 9 cameras to other nvr that supports 16 channels but the nvr that have 9 cameras still has video loss compared to 16 cameras in the nvr. What are the possible problems in the system?

    • Video loss usually occurs when connection between video feeds and monitor is lost. By switching NVR or checking possible loose connection will help in some cases. Given what you described, it's possible that the connection between cameras and NVR is disrupted somewhere along the way. It's good ideas to double check the connection again (re-plugging in them into the router or NVRs) and check firmware update, or having further check by professionals.

  • MBF NYR 66

    Screens monitoring/displaying real time store activity are not working for two or thee days and only show message ”Lost Signal”.
    Is the stream available for viewing those ”Lost Signal” days after it is repaired?

    • If you are using a NVR or DVR to store footage and videos, signal loss could happen when connection between NVR/DVR and monitor is lost, but the footage is still available for viewing after the connection is restored. It's advisable to check all connections in your security system. However, when the connection between cameras and monitor is disrupted, and footage that hasn't been saved or recorded to a SD card, a hard drive or cloud earlier is impossible to retrieve in such scenario.

      • MBF NYR 66

        I wish to clarify, as I've received varying answers to this question. One stated that the stream/footage is not recoverable, due to the camera(s) needing power to rec eive light on the image sensor (to create the image) and then needs to store the image somewhere. Without power ( Signal Loss) this cannot occur, as there will not be any recorded content to review.
        To your reply regarding the saving or recording to an SD card, hard drive or cloud, is that something the system will automatically process? I'm confused.

        • Indeed, the stream/footage is not recoverable when the power connecting to the camera is cut or disrupted. Regarding saving or recording to SD card, hard drive or cloud, you need to configure some settings after the purchase. SD card is primarily used for event-based storage, some of them is set by default like Reolink. If you are thinking about recording videos to NVR, please refer to https://reolink.com/faq/record-videos-playback-recordings-with-nvr/; if you are thinking about uploading videos and recordings to a FTP server, you can refer to this FAQ https://reolink.com/faq/set-up-ftp-in-reolink-client/.

          If you are using Reolink products, we would strongly suggest you contacting our tech support https://reolink.com/contact-us/ for further assistance. If not, we would suggest seeking tech support from the providers.

  • Joseph R

    Nice article. I tried all the steps but in vain. My 6 ip cameras all different brands were working fine with Swan DVR..until I had to add a camera and accidentally reset the DVR to factory default and now only the new swann camera works and all 6 different brand cams show video loss, any advice would be helpful

    • Thanks Joseph R. First make sure all your different brand cameras are powered on because more often than not power is quite often the reason why there is video loss issue.

      Besides, you can try updating camera and DVR firmware and reach out to Swann tech support. Keep in mind, different brand cameras could possibly experience compatibility issue with different brand DVR/NVR.

      • Joseph R

        Thx will try to update the firmware

        • You are welcome! 🙂 I am glad that we can help in any possible way! 🙂

  • neelam tranam

    Hi! Need some help with my QSee camera system. I have no video on any camera. I can go back to the last day it worked...you can see over the course of 10 minutes where the video stars fading away until it's completely gone. I checked all the connections and restarted as well

    • Hi neelam tranam, normally when cameras show no video or video loss, there are many possible reasons, for example, power transmission (connection, power surge, power voltage..) or signal transmission (connection, signal loss, cable issue...).

      My suggestion would be, first and foremost, powering off the cameras and video recorders (DVR/NVR) and reconnecting them once again to see what could possible be the reason behind the black-out.

      Then it's important to check the signal transmission to make sure the video signal is transmitted smoothly. If the problem repeatedly shows up, reaching out to the tech support and after-sale service for trouble-shooting or replacement if necessary.

  • Dayleen Medina

    I have qcee cameras n i loose connection only at night. Connection is perfectly fine during the day.

    • Interesting! You can check whether there is enough power supply to the cameras or the NVR as the power could have an impact on signal transmission.

      Or you can try to update cameras’ firmware to the latest to see if such problem continues to exist.

  • Derryl Hermanutz

    Less than a year ago I bought an inexpensive Sannce 4 camera system, which works great. But 3 of the 4 long power/video wires have failed, and had to be replaced. The problem is not the connectors. There is power at the feed end but no power at the output end. I just hope the replacement wires are better than the originals, because if keeping this system working requires changing 60 foot runs of cables every couple of months for the rest of my life, I'm going to abandon it and try a wireless system, or a different brand that is capable of making non-defective wires.

    • Hi there, wires and cables do have an impact on camera system's general performance. Choosing a system with durable and reliable wires for data transmission is a right choice. Meanwhile, it's important to protect wires and prevent them from degradation, for example, making cables waterproof, avoiding exposing the cable directly to the sunlight. Wireless systems like Reolink RLK4-210WB4 https://reolink.com/product/rlk4-210wb4/ is well received and popular with many homeowners.

      • Derryl Hermanutz

        My cables are all waterproof, and not in direct sunlight. There is no visible reason why the cables stopped working. I checked out your website link to your 4 camera wireless system. It looks like a good system at a good price. My house is made of steel reinforced cement block and concrete. Will there be a problem with the camera signal going through the walls to the receiver/DVR? Our home wifi works good, except in one upstairs bedroom that doesn't get good signal.

        • Derryl Hermanutz

          P.S. My house construction is ”earthquake-proof”, which means there's lots of steel in the walls.

          • Yes, 4 camera wireless system RLK4-210WB4 https://reolink.com/product/rlk4-210wb4/ is indeed a nice wireless camera system. The wireless cameras communicate with its wireless NVR wirelessly. It should be okay for the WiFi signal to transmit through the walls. That being said, it's advised to place the cameras well within your WiFi network and try avoiding too many barriers in between.

  • HaRris GaUt

    ive got a problem a while ago but i cant solve it ... my dvr is 8 channel but i can only 7, cuz when i put all 8 cameras in dvr, only 7displays in my monitor. port2 and 3 seems have the problem.. when channel 2 is working channel 3 is not .. and when channel 3 is working, channel 2 is not ... this problem makes me crazyyyy . 🙁
    any posible help or solution ??

    • You might need to double check the power supply to cameras and make sure all the cameras are getting enough power as they require. This problem could also be caused by loose connection between cameras and DVR or cables problems. My suggestion is to re-power all cameras and re-plug them into the DVR with new cables if that is possible. If the problem stay unsolved, it's advised to reach out to the tech support for further assistance.

      • HaRris GaUt

        thanks sir but it doesn't solve my problem..

        i don't think if it is strange to you but the scenario is I have 8 cameras 3 units 1.3MP bullet type AHD camera and 5 units of 2.0MP dome type AHD cameras, the tech support told me that I have to replace 1 unit 2.0MP camera to a 1.3MP camera to solve my problem.. Luckily it works! I have now 8 cameras displaying in my monitor .. XD

        • We are glad to hear the problem is solved. It's a bit difficult, as I mentioned in the article, to fully pinpoint the cause especially when cameras of different brands and different type are involved. Seeking assistance from camera manufacturer is always the most effective solution as they understand better their particular type of models and its makings.

  • Scott

    My system started to act up a couple days ago . All my cameras go to video loss aka black screen The new they flicker on and then offf or I get a screen with lines If I unplug the system for a awhile then plug it back it It takes a while but then all cameras work fine But after a while it does the same thing

  • James Spychalski

    I keep getting video loss

    • James Spychalski

      I did check all my powers and connections and they are good the system is only 2 days old

  • RackRack

    I have 6 Cameras on one switch and power supply to power up the cameras. My switch is connected to server through OFC. I checked video recording for 24 hours, and 3 out of 6 cameras recording only for 20 hours out of 24. I check everything connection, power but no luck. Video recording is stored on NAS. Please anyone here suggest me what can I can do to resolve this issue.

    • Hi there, video loss happens for many reasons. Does your switch provide enough power to all your cameras? Is the connection between you cameras and NAS disrupted? Take all necessary steps mentioned above to rule out potential network or power problem, meanwhile reach out their tech support and if the problem lies in hardware, try to contact the manufacturers.

      • RackRack

        We don't power up cameras with Switch, we have separate power supply to power up cameras.
        connection between camera and NAS are not direct as I mentioned it is switch to switch OFC connection and connection not disrupted. 6 Camera on one switch and 3 out of these 6 record perfectly fine but 3 out of these have video loss. Strange that issue doesn't happen with particular cameras. Some day no 1 camera out of 6 has an issue other day number 5 camera has an issue.

        • One user said lowering camera solution helps resolve the problem, maybe you could give a try.

          • RackRack

            Thanks ..let me give it a try n will update you

  • Ben Prater

    Having an issue with one of my dome cameras. All I get is a white screen from the camera. I have ruled out any problems with the wiring and dvr, so it has to be something with the camera itself. Thoughts?

    • Hi Ben, what brand of dome camera you are using? It could possibly be the camera but also could be some settings of the camera.

  • Faye Smith

    I have the night owl system with 4 cameras and all 4 has loss video at night , during the day I have a lot of snow over the view. Which makes it hard to view.

    • If you are having a lot of snow over the view, it's likely that your cameras are getting interference from strong electrical currents or there are some issues with power supply. Maybe, try change cable and plug into different port to see if the problem still exists.

  • John

    Hi, I have Lorex 4 cameras surveillance system. Lost all cameras at the same time (no signal). Checked all connection and power supply to the dvr and all is ok. !2 volt going in to the unit but there is no output voltage to cameras. Sounds like the problem is on the board. Any idea what I am up against? Is there some place where I can get schematic diagram? Thanx in advance, John

    • Hi John, it seems like the problem lies in the board. It's better to reach out to the manufacturers.

      • John

        I was hoping to get circuit diagram and trace the problem myself, as I am somewhat familiar with electronics and besides it would be much cheaper then tracing the manufacturer and sending the board to who knows where, possibly China and then the waiting time is also a factor that I`ll have to take into consideration. Well, I`ll try to do it myself first, starting with checking components, like the caps first and then taking it further into the circuit. Thanx for your quick reply, John

        • Hopefully, we could see your security camera system up and running soon. Good luck!

          If you are looking for a replacement or upgrade, Reolink cameras & systems would be great alternatives 🙂

  • Jose

    I installed a system and I'm getting video loss and when people are walking it seems like a shadow is following them. Is that a power supply issue? I have them powered by a spider 8 power supply wall connector— should I change it to a power box?

    • Hi Jose, what kind of system do you use?

      You could try changing the power supply but do make sure your system is getting enough power supply.

      The image problem you described could be caused by the various reasons, for example, the areas are not well-lit, or something covers or block the camera.

      • Jose

        It's and LTS system with 1080hd cameras with verifocal. It's weird it's more in the night vision that it looks the the person has a blurry shadow following them. I'm aylso loosing video which I say it's due to the power supply system I'm using. But I can't figure out that blurry shadow. Can it be from the power as well?

  • Ravi Kant

    I have installed 02 night vision outdoor CCTV cameras and DVR (both Secure Eye brand) in 2013. Now, after 04 years, the DVR gives beep sound frequently and the picture becomes black & white and shakes also, What can be the probable faults ? Is hard drive needs replacement or there can be other faults ?

  • Richard Johnson

    I just installed the wifi 4 camera system, all cameras have 3 of 4 bars of signal strength, they are all outside. Worked great for over a week, then during the first heavy rain, they all displayed video loss. Any suggestions?

  • martin

    i installed cameras in one tower but when it comes to 6;25 to 6;30 the perimeters go off

  • Baylen T. Todd Sr.

    I installed the Cobra 63890 8 channel surveillance security system two days ago. The first night it was just spread around the house to make sure it worked. No problems there. Put it outside the next day. No problems all through the night. Today I moved one camera by tilting it down just a little to get more of the yard in it. When i checked my phone to see what the camera captured it showed the four squares with no video inside of them. Figured I'd go ahead and move the next camera approximately 10 feet. There was plenty of slack in the wires for me to do this and still plenty of slack after i got done. So i didn't pull the wire hard enough to do any damage nor pull where it's connected to the receiver. I've unplugged each cameras power source and reconnected them. I've rebooted the entire system. I've unplugged both the DVR and the plug for the cameras. They both are plugged into a multi-outlet power strip with surge protection. Tech support is only telling me to check the connections for power and video which I've already done. What am i missing? How does tilting one camera down cause video loss in all four cameras? How can i fix this?

    • Baylen T. Todd Sr.

      Over two hours after the problem occurred it seems to have fixed itself.

  • Joselina Sanchavez

    I have a samsung system and it just said that it lost wifi connection, now when I connecting it is telling me to ”check if the USB dongle is connected” what does that mean?

    • Olivia

      Not sure how your setup looks like. The USB dongle is normally a portable device that allows you to access the internet.

      When the camera system loses WiFi connection, one way to fix it is to reconnect to the home router and try a couple of times to see if anything changes.

      For starters, maybe take a closer look at your network setup.

  • Heidi Prell

    Hi Olivia, i have q see cameras they get words on the monitor ,like set up menu or even Japanese writing . If i unplug the cameras it gose away for a little while but always comes back what is the problem

    • Hi Heidi, you may conduct a thorough examination of all power and network connection to find if there are any problems. Also, upgrade your security cameras to the latest firmware version to see if it works. Hope this would help.

  • ricarte sumbillo

    I have an AVCom DVR which has ip connection capability but our area has no internet connection. The problem is whenever you turned on the DVR it would show all 4 CCTV cameras on the display/monitor but after a while it will reboot and show same thing until it shows ”no signal check connection”. I noticed inside the dvr will show this blinking lights over and over again together with the beeping sound. I would appreciate if anyone can help me on this? Please send me a reply to this email address ricartesumbillo@gmail.com... Thank you!

  • Simon61161 .

    I have 2 cameras perfectly sinced to my desktop computer, phone and tablet, but when I tried to install the same app on my laptop as I have on the desktop, I get audio but no video. Wifi is running just fine on the laptop (I'm accessing the internet on it right now).Only thing I can think is I am sincing the cameras to one too many devices now?

    • steve

      make sure your logged in as admin and trun off hardware excelleration and disable plugins

  • Prabakar

    The video capture is flickering with regular intervals. What could be the reason?

    • Olivia

      Hi, Prabakar, you may switch the exposure setting to Manual and the value to 1/10000 or another value and see if it works.

  • kmn Info

    Hi Im using hikvision 7100 series dvr and 2mp cameras. today suddenly it not sows video and it shows no video only
    I had checked all of the possible ways but it won't works. it still dont shows video

    • Olivia

      Hi, there, have you tried all the methods in the post above? If all of these still don't work, it's recommended that you contact the support team of the camera seller for thorough troubleshooting.

  • Olivia

    Hi, Rowan, video loss is mainly caused by insufficient power supply and weak network connection. Please check that power voltage to your cameras is appropriate and your cameras are connected to stable network. Hope this would help.

  • Olivia

    Hi, there, please check if there is any firmware update available to your old model DVR. If not, we suggest that you look for new DVR or NVR alternatives from reputable brands. FYI, Reolink offers you a wide range of qualified NVRs and security systems. You may check here https://store.reolink.com/security-camera-systems/ to learn more.

  • D Barton

    2 weeks ago we had a hard wired Night Owl system installed. Now on one camera there is no night vision. During day recording there are 40 – 60 min time periods missing and it always involves the same person we are trying to catch in the act harassing us and damaging our property. Can his high powered flood lights he has and points at our cameras interfer with the recordings? We know jammers will not work in disabling the hard wired cameras. What can this person be doing to get the recordings to stop when out in front if our house? Thank you.

    • Olivia

      Hi, there, high-powered flood light can interfere with your camera's recording at night since it is too bright for the camera to switch to its night recording mode. You can call the police for help and it will be easier to identify the bad guy if there is any CCTV footage capturing that harassment. Hope that you will get the issue solved soon.

      • D Barton

        We already tried the police, they say it is a civil matter. And who can afford an atty after paying a $1000.00 for a fence to divide the properties and it was placed about 10″ on her side of the property line. He tore out the property assessors makers and trespasses onto her property to nail and hang things on her fence and at times jumps up on it and hangs there making faces at her to show he can do whatever he wants. He also uses a leaf blower to blower to blow the leaves from city trees that land on his property over onto hers after he sees she has cleaned up her yard. Another $1000.00 more for 5 Night Owl security cameras installed and absolutely horrible customer service from Night Owl who apparently is overseas.

  • magnet

    I have had a cctv working for 3 years now 1 of 4 systems in our business and a few days ago I had a lost disk message on the screen .... no pictures at all from the cameras , although they are working , power is getting to the system I changed the HDD and still the same message and no pictures I have also tried new power supplies ...... normally when the HDD goes there is still images on the screen but no recording available I am at a loss , has anyone got any ideas?

    • Olivia

      Hi Magnet, you may reset the CCTV system to check whether it works properly or not. If this doesn't help, you may contact the support team of your CCTV system brand and ask them for further help.

  • alroker100rack

    This was very helpful, turns out my power source wasn't able to power 4 camera so I replaced cord and works perfect.


    We are getting a message on the app that says the specified device does not support advance function (TCP relay and P2P tunnel module). Can anyone tell me what that means.

    • Olivia

      Hi, Barbara, you may check the network connection of your security cameras and make sure that it meets the network standard stated by the security camera brand. Hope this helps.


    I am getting a message on the app that says the specified device does not support advance functions (TCP relay and P2P tunnel module.

  • Matt Conigliaro

    I am a professional camera installer. A customer bought a Reolink system. All cameras worked fine after the installation. Then a camera went out. Video loss. I checked the port, the cable and plugged it directly to the NVR. Nothing. Ordered another camera and same thing. At this point, I don't know if I have received two bad cameras or there's another issue.

    • Olivia

      Hi, Matt, confirm if those two security cameras are powered on with red light flashing when you plug them directly to the NVR. Please check the cable and the port as well by (1) connecting those two security cameras with the same cable to another port; (2) connecting one of the other well-functioning security cameras to that port with the same cable. You may also send a screenshot of the security camera status in the Client https://support.reolink.com/hc/en-us/articles/360012080094-Four-Types-of-Status-for-Reolink-Cameras-on-Reolink-POE-NVR to our support team, https://support.reolink.com/hc/en-us/. They will come back to you asap.

      • Matt Conigliaro

        I checked all of that as I stated in my first comment. I found out that since I added a new camera, it had a duplicate IP address. So I defaulted the system back to factory and it fixed the issue

        • Olivia

          Hi, Matt, glad that the problem solved. Thank you for your feedback!

    • JoW

      When our cameras all went out it it was because the screen we used for a monitor wasn't set for the resolution the dvr needed, to fix this you either have to hook up a computer monitor and change the resolution until the cameras show up , then hook the dvr back to whatever you used before, should work, or change the resolution on the monitor you are using now to view the cameras. It has something to do with changing from NSTC to PAL.Hope this works for you.

  • Darrin Case

    hi i have xvim 4 channel all cameras was working all of a sudden they all stopped and screen gone black i have turned it off and then waited then turned back but still the same https://uploads.disquscdn.com/images/6ff7c105578afef8d0fc888213ee477cfd12c9e1290f0055eccb6c0f24c769f4.jpg https://uploads.disquscdn.com/images/2bdbeb958dce2be3dda1c109f66927e3acb5e757b9d2e69b10c90f4668c29700.jpg

    • Olivia

      Hi, Darrin, the main causes of video loss are the insufficient power supply and weak network connection. Please check if your cameras are working with appropriate power voltage and stable network. Hope this helps.

  • Soma

    Hello . We have installwd 100 odd https://uploads.disquscdn.com/images/ac980ac5f6b507442522e462d5c034e88b2fa751607eb9ac215898753ae6f237.jpg cameras. After installation they have been working fine. Off late black screen keeps appearing in few windiws giving an message that video could not be parsed. What could be the issue and pl suggest fix for the problem. Thanks in advance.

    • Olivia

      Hello, Soma, please check if your security cameras that won't show on the monitor are working with proper power supply and stable network connection. If this won't help, it is best to contact the security system brands for further assistance.

  • Greg Power

    I recently purchased a swan 4 camera system. The system was purchased was already installed and working when I purchased. I had an electrician install in my unit but are getting a video loss dispa
    ly for all 4 cameras. What could be going wrong?

    • Olivia

      Hello, Greg, please make sure that your camera system is working with appropriate power voltage and stable network. Also check if there are IP address conflicts or cable problems. Hope this helps.

  • mandris

    when i change the date in the cctv camera system which is previously year back, now how can i play those videos recorded before changing the date.

    • Olivia

      Hello there, changing the date in the CCTV camera system will only change the time stamp on the recording. So, you can find and play the previously recorded videos in the recording path, like NVR, your PC or the SD card. Hope this helps.

  • Jennifer Alberti

    So I don't understand what to do if one camera is black and 3 are fine

    • Olivia

      Hi Jennifer, you may swap the cable and channel for that camera first and see if the issue would be solved. You may also check if there is an IP address among your cameras. If these solutions won't work, it is best to contact the support team of your security camera brand asap. Hope this helps.

  • Olivia

    Hello Richard, you may swap the channels and cables and see if those add-on cameras would come back online or not. You may also reboot the cameras and the NVR again. If you are using Reolink products and these won't work, please contact our support asap: https://support.reolink.com/hc/en-us/requests/new.

  • Olivia

    Hi Donald, it is best to consult the support team from the security system brand and ask them to offer you further assistance on how to get the main menu screen up when you enter the live view page. Hope this helps.

  • Rachel

    Is it possible to recover lost footage On our DVR due to a loss of power?

    • Olivia

      Hello Rachel, the previously recorded footage on your DVR will not be removed due to power outage. However, it would be impossible to recover the footage during the power outage since your DVR and cameras were not able to work properly at that time. Hope this clarifies.

  • Rachel

    Is there a cloud based video storage option as opposed to DVR?

    • Olivia

      Hello Rachel, it depends on the DVR brand that you are using. Take Reolink as an example, we offer Reolink Cloud service for some of our security cameras and allow our customers to back up and upload footage to FTP servers as well. So, it is best to contact the support team of the DVR brand and ask them to share more info on the cloud-based video storage. Hope this helps.

  • Shakir Hoosein

    I have recently bought a reolink poe nvr 4 cam system from amazon and I am dissatisfied with the fast forward rate of maximum 6x only. Is there a way I can increase it to 32x speed perhaps? It's tedious to look through footage at a painstakingly slow rate.

    And I am not granted the ability to fast forward playback footage using reolink client.

    Some kind help please?

    • Olivia

      Hello Shakir, are you using Reolink RLK4-410B4 (4MP/5MP security system) or RLK4-800B4 (4K/8MP security system)? Currently, you are allowed to fast forward the recordings via Reolink NVR with a playback speed of maximum 6x only. Also, we don't have plans to add 32x speed as of now.
      To enjoy the ability to fast forward playback footage via Reolink Client, you need to update the software to the latest version or download the latest version of Reolink Client here, https://reolink.com/software-and-manual/. Hope this helps.

  • Olivia

    Hello Michele, it is not suggested that you fix this issue on your own since it may lead to permanent damages to the DVR if you are not a professional. So, it is best to contact the support team of your CCTV security system brand and ask for further assistance. Hope this helps.

  • Olivia

    Hello Rick, you may connect your mobile phone to the same network that your security cameras are connected to and see if the network connection works or not. Also, you may upgrade your security system and cameras with the latest firmware. If these won't help, please contact the support team of your security camera brand asap.

  • Eric

    I have Swann cctv system at home where the video loss occurred on all camera's. Did some cable checking and found that left you only connect one camera it works, more than one both fail. All camera's work on all ports on the dvd and the power splitter. Could this be a problem with the power splitter not providing enough power for more than one camera? Thanks for any help.

    • Olivia

      Hello Eric, that could be a problem with the power splitter. You may try to plug in the power adapter of each security camera into a different socket and see if it helps. If not, you'd better contact the support team of your security camera brand for further assistance. Hope this helps.

  • Hi, I got a TECHVIEW 2.4 GHz wireless 7″ LCD 720p Surveillance kit for xmas and only just got it set up yesterday, it is supposed to have a wireless range of 100 M but does not sound an alarm or start recording until someone is almost at my front door, doesnt even beep when a car pulls into my driveway, only beeps when the person gets out of the car , which is about 2 metres from my front door, any advice??? take it back or??

    • Hello Tamara, you may take a look at the motion sensor settings and see if you have enabled the sensor to work. If this won't help, it is best to contact the support team of your security camera brand and ask them for further assistance.

  • FongKong

    Hi i have an 8 channel dvr system ,for the past month 1 camera shows no video black screen,but each time it RAINS it works wtf, every single time it rains hard it works for 3 or so days(then it stops as the rain does)

    • Hi there, it is best to check the power supply and cable and see if the DVR and the cameras are powered up properly. If this won't help, you'd better contact the support team of your security system brand for further assistance.

    • PP

      Most likely your power line is open or disconnected somewhere hanging on by a thread. The water probably helps it conduct electricity and keeps it powered normally until it evaporates.....that's my best guess. Goodluck.

  • Olivia

    Hello there, you may check if there are IP address conflicts or signal interference among your cameras. If this won't help, it is best to contact the professionals from the security camera brand asap for further assistance.

  • Andrew Barker

    hi my 4 channel cctv my IR was not working on one camera so i bought 1 different from from the others was going well till 3 weeks after then the other 3 cameras went off now i carnt get any on ..i plug 1 in and the other goes off seems like i can only have 1 pluged in a 1 time i bought another unit and its still the same .

    • Olivia

      Hello Andrew, it is possible that something is wrong with the specific port on the NVR. You'd better contact the tech team from your CCTV camera brand and ask them for help.

  • Olivia

    Hello Sandra, you may try to reset the DVR system and reconnect the cameras to the DVR. Next, set up a new password for the system to see if it works. If not, you'd better contact the professional from the security system company asap. Hope this helps.

  • Olivia

    Hi Sandra, to reset the system, you may need to press the reset button on the DVR. If the DVR is out of reach, you may try to restore the system to factory settings via the DVR operation system. If you have no ideas on how to reset the system, you'd better contact the professional team from the security system company for help.

  • Tomass Aizstrauts

    Hi. I have Ohwoai camera system and im getting allot of video loss. Trying to put them all around my home, and its pretty big, by the cameras who are farther are working but the one who is the closest isnt working. And if i put them right next to the nvr and router they still get video loss at some points. I dont get it. What should i do? And one more thing. I have the main router and than small wifi routers who expend the wifi from the main router. Dose the cameras work if i connect them to different small routers?

    • Olivia

      Hi, Tomass. There are some possible reasons for video loss: insufficient power supply, power spike, weak WiFi connection or low bandwidth, incompatibility, problems in cables or wires, hardware or firmware problem and IP address conflicts. You may check your cameras and accessries according to those or you may just resort to the support team of Ohwoai. You can also try another security camera band which is more reliable and well-received next time. Hope that helps.

  • Michael

    Hello. I have four Nite Owl cameras that are not working properly. On my phone they work fine. On my laptop they turn on okay but in exactly two minutes they turn off and all say connection failed. I click off, go to the desk top icon and start over and they come right up. Two minutes and they all turn of. This started when I switched from my old windows seven computer to a new windows ten laptop. Any ideas appreciated.

  • Johnny ricter

    When working late at night in my shop, I checked one of my wireless cams on my iPhone. Someone had pulled in across the street. As they walked to the back of the house, I noticed them both looking towards my house. I wondered what they may be looking at in my yard, I went to the main console to investigate.

    When I pulled up the video from the camera, I watched the vehicle arrive. After it stopped, I saw a light, about the size of a smart phone, inside the passenger compartment. The light moved to the driver's window and away again. In a few seconds, it reappeared in the window and the video ended without the occupants ever exiting the vehicle.

    Considering I had just seen them walk to the house on my iPhone, that quickly got my attention. I began to search for other times that vehicle arrived or departed. To my dismay, nobody could ever be seen exiting or entering that vehicle. By scouring the internet, I found that a device called a deauther exists.

    I purchased one on line, to test my system and figure out how to safeguard it from such an ”attack.” Although, when I tested my system, the deauthor caused ”No Signal” on every device I deauthorized. In the instance above, the camera obviously maintained a signal, or else I would not have seen them walk to the house.

    Any feed back on the device being used would be a great help. It is disturbing to know that a theif or vandal can disable recording on a security camera. That leaves myself and potentially any other person depending on security delivered via wireless camera, with a false sense of ”security.”

  • Olivia

    Hi, Jason. I suggest you contact our support team for help. You could submit your problem here: https://support.reolink.com/hc/en-us/requests/new and the support team will respond as soon as possible.



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