Hi, im new in this forum, and i bought a used Pioneer AVH-5700DVD.

My problem is very easy, the video output don't work. I atached a display or tv with RCA input and don,t display anything. I search in google, and the pioneer manuals, and i don't find the problem solution. I press A. MENU, and follow the instructions to turn on the rear display, but the option, R. DISP, is not selectable, it have a grey color. the other buttons are selectable and have a blue color. Anyone have the same problem?? i try and try and try, and i couldn`t find the solution.

can anyone help me please?? thank's¡