Rear seat entertainment system not working

I have bought a used X5 2009 model with below attached entertainment system installed. Its not switching on and I have no idea how to open or repair it.

Can any one help?

I have found the part number (65 12 0 421 339) but can not figure out what is faulty? I have got no idea how to open the screens from the seats or find the wiring path to find the issue or may be resolve it. I have also found the below

http://bmwfans.info/parts/catalog/E7..._dvd_advanced/


I even prefer to remove the system and install a new one if this one cant be repaired.

Refer to attached pics.

Any help is appreciated.

Did you get this figured out or does anyone have any information on this? I have the same system and i do have the remotes, and nothing powers on at all, neither screen or the DVD player turns on at all. Any ideas or where to start?

You need to switch on the screens first with remote. Then you will notice LED lights on the dvd player which can be switched on with a remote or touch on the power button.

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.