Dr. Drivewayz

I bought a used 4 channel Storesafe. I got it home and connected one camera and a small color TV that I had. The unit powers up, beeps, lights go on, but I am not getting any video at all. I looked at the Pdf manual online and followed all of the startup instructions. I have a blank screen. There is no menu displayed or video from the camera. Any of you tech gurus got any ideas?

I have read some of the "introductions" and I will simply say that I am here to ask questions. I just want to put together a basic camera system around my house. I had some sketchy neighbors move in and I got interested in this stuff.