Swann cctv not working after dark

Bluefairie56

Strange thing. I have a Swann cctv with 4 cameras. It’s ages old but up to now no issues. One camera last week records perfectly during the day but as soon as it’s dark doesn’t record anything.just says video loss.  Thought it might be a broken IR sensor so need new camera but then the next day another camera all through the night started clicking on and off ( I usually hear it click on once when it gets dark) .again all 4 cameras worked all today but as soon as it got dark none of them are recording.and just says video loss.  I can possibly understand the 2 possibly faulty ones not recording but for all 4 to not record after dark is a bit strange. 

If anyone knows why this has happened when I have not altered any settings at all then let me know please. I did set up the thing years ago and it’s worked fine but I have no real computer skills so I need to know what to do in simple format. Lol. Thanks

john1

Could  be a Power supply issue  as I/R's led require more power at night  Google search "swann cctv fails after dark" quite a bit of info there in various posts 

spud17

We've got a similar setup at work. 
The first thing that I'd check is the BNC connector.

Bluefairie56

Thanks both. I don’t know what a BNC is but google is my friend

Bluefairie56

As it happens it turns out I had a spare BNC connector lead and replaced it on one camera with big hopes. Sadly just checked and all screens went black as soon as darkness fell. One did briefly go to black and white before it got totally black so to me that’s a sign the IR bit is working. I will google a bit more and see if I can locate problem.