I am currently running a GV-800 card 7.05 and 4 cameras, which I got from a mate which work's for a security company, he recently brought up a GV250 (all he could get at the time) so I could try version 8 software, everything installed ok, but when I start it one of my cameras is constantly flashing on the screen, so bad that it sets off the motion detection, my mate doesn't know what what the problem could be anyone got any idea?

Is the camera a wired, or wireless camera?

Can you plug the camera into a monitor or a TV to check the picture from your camera?

I would check to make sure that the Video Source is set correctly. US > NTSC Europe > PAL.

The camera is wired, it works perfectly plugged into a TV and also on the GV-800 card but with the gv-250 the picture constantly flashes and I seem to get the lot of red pixels at night when the nightvision comes on