Exactlly, I have the nightwatch B/W camera model SC23A and also experiencing some unexplainable performance. I purchased a small mini NTSC b/w TV to use to view camera but could only hear audio no video when I plug the RCA plug of camera to back of TV. However when I pluged the wires into a VHS machine and then output back to TV both video and sound came in perfectly clear on TV?
I then had the wires go to a Winfast 2000 video card on my PC and also it worked great.
The next day the reception started to get graining and flickering, I moved it back to the small TV and the same, until now I can again only hear audio but no video.
The same thing happen about a year ago while my camera was under warranty, and I had it replaced. I installed it in a speaker to conceal it and it worked fine for about 6 months then it just stoped working?
Can anybody suggest why a camera would stop working overnight, is the camera not grounded correctly and it shorts out? or are these cameras just garbage?
Any suggestions would be appreciated even though I've just about run out of patience.