Hello anyone I live in hope somone may be able to offer some advice for the following fault on my beocenter 1 type 8523 which i obtained from ebay as spares /repair. All i have is the red stby light when i apply power no responce via beo4 remote not even a blink from the red standby light. I have been advised by the previous owner that B&O have done an assesment on the item and advised a PCB power supply fault, so to confirm this i removed the tube neck pcb and applied power and still only red standby led,  presumibly then that would confirm the fault is elsewhere perhaps on the power supply PCB4. There is some 380 voltage @ C4 on pcb4 and with other caps  however this varies wildly from 170 -380, I have also checked for a  -8V  stby on pin 9 socket 514 of pcb 72  and nothing there, I have tried to find a wiring diagram for PCB4  with no joy this site only has a block diagram for all the various module connections.  Does anyone have any idear were to start looking for the fault and even a wiring diagram for PCB4 so i can start to enjoy watching this lovely TV.

Regards Maurice.