I'm very frustrated, being a car audio beginer but understanding electrical systems well, I cant get this figured out. I test fit it and plugged it in even drove with it setting in the place where it was going to be. It worked fine shuffled and everything. I took it out fabbed a facing piece and covered it reinstalled under the very same conditions and all it will do is beep repeatedly. nothing else works. no lights nothing... I checked fuses ground and power they are fine. checked for under voltage nothing. the only thing that makes it stop is unplugging the RCA connections. That stops it and it appears UNPOWERED. Please help!!!