How to open back cover on Beosound 8 ?

My Beosound 8 wont work anymore, so i decided to take a look inside it myself, but i dont see how to get the back cover off. I remove 6 screws, what else to do? 

(..and also, what to look for when open?)

 

Start from the front.

What isn’t working?

It wont turn on, no green light.. used to work fine before i moved.

Connect a source that is playing to the rca input and do some random button pressing g for a while on the front panel. Usually does the trick.