mercedes benz command w211 dvd problem

[oemrepair]

hello,


i have on my desk:mercedes benz command w211 dvd becker be 7039 problem is unit start and stay logo.

i heard it hw problem all info is welcome.



regards

[LegendPT]

check the gateway in the trunk of a phone module in between. If you have any of this modules faulty the fiber optico circuit is not closed, and the unit odes not stat tup