So i have a 2008 Tahoe, oem nav and backup camera. Recently installed a 2300nex with pac rp5gm31. Everything worked perfevtly until this morning when I went to back up the screen switched over but no image. When I got home I checked all the settings to no avail. I took the unit out and plugged in my factory one and the rearview camera worked perfectly. I plugged the Pioneer in, turned it on, put car in reverse and plugged the rearview RCA from PAC adapter into the brown camera input and noticed if I pressed it into the radio the image comes on,let go image off. Am I wrong to assume the input is bad?