WOW>>> this is the dumbest system ever, especially since its a BMW one would think they were smarter. OK thanks Hazee because i have spent hours testing and retesting and checking wires all over the place and it turns out, its just a DEAD BATTERY IN THE REMOTE!!!!! The only way you can turn anything on with this system is by the remote, you must first turn on the Screen/s then the power to the DVD player will come on. You cannot manually power anything on. So if you loose the remote or have a dead battery, it will not work! Pretty dumb!. Anyways....now ya know.
Good luck and hope this helps other people in the future.