CCTV cams. 1 good and 3 bad as picture showing. Is there anyone know why? This is my first project? thanks

Hard for me to say what the problem could be.

If you can hook up a small TV that has a composite input (which is the yellow connector on the back, or on the front of the TV), to the camera directly, then this would be great! If you have good video at the camera, then this tells us that you are getting power to the camera, and the camera is putting out a good video signal! This means the power side of your cable is OK! This means the problem is with the wire on the video side of your cable. If you do not have a good video then the power side of your cable is bad, or your camera may be bad. There may be a situation that the wire is ok, but the connectors on the end are giving you the problem.

What do you think?

What the black thing going from corner to corner?

I have hooked up to the tv, and it is happening the same thing on the tv. I have redone all the end connector, but no luck. I also tested the cameras and they are all good as the number 1. I also switched the power port to the good camera port, and still no luck.

It is the shade of the house

Do you have a multi meter, and can you take a reading under load of the 12 volts at the camera?

A fence?!?

flywire !

I was thinking a roof but i concede I think your right?