Yesterday evening my installer completed the installation of Dom's RGB unit on my 535d; it was very late, so there was no time to properly test everything. Today I noticed that I've "lost" my CD changer and CD player in the dashboard: the icon on the i-drive is grey, like for any function not activated, and there is no chance to play a disc. The RGB interface itself seems to work fine and I didn't notice any other problem: radio is working, Pro-Nav is working, i-drive is working well.

Next week I'll bring back the car to the installer but I'd like to be able to suggest to the installer where to look for the problem. Does any of our forum super-expert (Hobi, maybe? or Dom himself?) have any suggestion to pass to the guy in the shop in order to find out and quickly fix the problem?

Thank you very much for any help.