I am having issues with a Beosound 9000 MK3 PCB 34. I am getting no standby light and power relay is not switching on. I have checked board and all ok. When exchanging PCB 3 from known good board to my known bad board the relay then works. So, issue is with somewhere on PCB3.
I have tried exchanging the eprom from the good pcb 3 to the bad but still get no life. Service manual says that microprocessor cannot be exchanged without first being wiped by B&O?. Is there any way around this issue? Is anyone offering repair service on these apart from B&O.
I have a X3 suspect PCB 3’s that I could do with being tested / used to make a good one.
Any help or advice would be appreciated.