Recently my backup camera system does not always work. I get a message that the system is not available and get a jumpy, staticy picture. When I googled the problem, it told me to tap the internal fonzie--what ever that may be.
Common problem caused by dirt and water exposure. Leads to corrosion entering the camera casing. Sometimes can be fixed with a few good hard taps on the side or back of the camera...but usually needs to be disassembled and cleaned or replaced entirely