A white screen or white areas on the screen In particular, make sure you use 3 pairs of wire for the 12 volt supply. Wire the cameras as per our guide to using CAT5 cable in CCTV.
If you are using CAT5 cable to join the cameras to the DVR and power supply make sure you are using a pure copper cable rather than CCA or copper-clad aluminium. You may also see image deterioration when voltage drop occurs. The camera re-starts and works until the IR switches on again. The IR illuminates which causes the camera to switch off. It could also cause the camera to cycle on and off. This could cause the camera to stop working altogether. When the IR illuminates the power requirement of the camera increases, if the cable run is too long or there isn't enough copper you will experience a voltage drop. One of the most common problems experienced is voltage drop. Failing that you may be suffering voltage drop. Stand closer to the camera and see if you can see an image. You could be trying to film too far away. IR range is pretty much made up and shouldn't be used as a guide to effective range. If you have bought a camera with a long-range, 20 or 30 metres plus from someone and you are expecting it to work at that distance don't rely on quoted specs. If you just point the camera into space it won't see anything.
Infrared needs to bounce off a surface back into the camera.
If that is all in order then stand in front of the camera quite close to it. Make sure the camera has power, ensure all the connections are secure and that the infrared is illuminating (this will mean power is getting through to the camera). Check all the same things you would look at during the day. The most extreme problem is seeing nothing at all on the screen. We have created this page to cover some of the most common symptoms and causes. They install a CCTV system during the day then at night find they have issues. We get a number of calls from people experiencing problems with their CCTV cameras at night.
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