How can identify about CCTV DVR has technical error or the adapter has some error
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There is common problem ,How can we know if the DVR is bad or the adapter.watch my video carefully and understand How can we know if the DVR is bad or the adapter
This guide will aim to provide some common troubleshooting actions for when one or more of your cameras connected to a DVR are not showing an image. Some of the troubleshooting steps will seem quite simplistic and may be unnecessary. However, if you skip steps, then you may well miss something simple, yet important.
Please note, this guide does NOT pertain to NVRs, which have some more complex rules to follow.
Which video loss is it?
There are 2 types of video loss - cameras and monitor. Monitor video loss is where the DVR is unable to be seen at all on the screen that is attached to the DVR. Camera video loss is where the cameras are unable to be seen on the recorder’s display (and by extension the attached screen). This guide does not address the monitor video loss as the troubleshooting for that issue is generally straightforward and requires only a single change on the recorder. We will only be looking at camera video loss in this guide.
Is it the cameras or the screen?
To determine if the video loss is related to the cameras, the quite simple test is to attempt to bring up the recorder’s menu screen. If you right-click with the mouse, you should see a response on the screen where you see a menu of some type. If you do not see a menu (indeed, if you cannot see any camera divisions at all) then it is an issue with the screen and you will need to check your settings for output on the recorder. If you get a menu, then you can close that and proceed with troubleshooting in this guide.
Check power supply
Obviously, without power, the cameras will fail to operate. Checking our power input should be the first step.
Check camera IRs
To try to determine if the cameras are receiving power, we will look for activation of the nightvision IR LEDs.
Cup your hands around the front of the camera.
Place your eye up to your hands, keeping out as much light as possible.
Look for the slight red glow that indicates the IRs are powering up.
If you do not see a red glow, that indicates the cameras may not be receiving power. That should then be the focus of your initial troubleshooting efforts.
Check power supply in use
It goes without saying that the cameras will not create a usable signal if the power is not connected.
You should check first that your camera power supply (or supplies) are properly connected to a wall socket or power strip. If you do have the power supply connected to a power strip, try a wall socket just in case the power strip is faulty or is a specialised unit that doesn’t have all the sockets active at all times.
Then make sure that your power cable is connected to your power splitters for input into the camera cables.
Check power splitters (if applicable)
Your power splitters go on the end of the power cable of the power supply. These then split the output from the power supply so that multiple cameras can share a single power supply. These then connect into the camera extension cable at the DVR end.
Ensure that you can trace a power line all the way from the power supply, through a splitter and into each of your camera cables.
Ensure that you have only used ONE splitter per power supply.
Check physical connections
The cameras must be connected to the signal inputs on the rear of the recorder. If these are not connected, or loose, then you may experience interrupted signal.
Check cables into recorder
Check that each camera cable is connected to a camera channel input.
Be aware that some recorders have similar connectors for ports that are not camera inputs.
Check that the connectors are fully locked, and that the connectors themselves feel tight. There should be very little give when connected correctly and not able to be removed just by pulling.
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