Hi Derek, Thanks a lot for your help! I measured today before disconnecting anything and the BC9500 showed no or only very little current on the pins marked above with an "X". Then I disconnected CD, Tape, and Radio at the same time. CD: disonnect P11 on PCB31. Tape: diconnect P32 on PCB20 - that was difficult due to the much too short cables

Dear all, My beloved Beocenter 9500 stopped working. It started with being in standby not reacting to any commands (like pushing a button) and resulted in not powering up after being disconnected and connected to mains. When I connect it to main, it makes only one click instead of the two clicks by the relais that normally occure during "boot-up"