Jose Malave said
Is this a Coaxial system? If so check the power to the cameras as this could be the culprit.
I have no idea if it is a coaxial system or not. I don't know what that means.
And I also don't have any idea how to check if the cameras are getting power or not. The power supply is plugged in, and slightly warm as usual, if that helps. What would I check, and how would I go about checking it to see if the cameras are getting power? I don't have any other cameras to plug into them or anything.
And how do I tell if it's coaxial or not?