Lately when I put my truck into reverse the screen only shows a black screen with static like lines going across. Occasionally I can shift in and out of reverse and the camera picture reverts to normal. Today it actually showed a mirror image of what was behind me. My wife's car was behind me on the drivers side and the camera showed it on the passenger side.

What could the problem be?

My truck is a 2010 F150 Lariat supercrew with Nav.