Hello everybody. I am new in this forum and have a big problem winth my F700bt. It rans very good till I tried to install a reverse camera. I did all well (video wire to rear camera wire) but when I power on the car, the f700bt does nothing. No lights in buttons and black screen. I have used search but I couldn't find nothing. I have tried to make a hard reset but nothing. I only can ear a little sound from the f700, but nothing more. Please help me.

Sorry for my english because I write from Spain.

Thanks