I have a Marantz SR-7000 (5.1ch) AV receiver, which recently started giving an issue with its center channel output not working. Giving a jolt (picking up the front of the receiver by a few centimeters and dropping it) actually makes it work for a few minutes! (found out by accident, but now is the only way to make it work unfortunately). I opened the receiver but did not find any loose board connections. But even touching any component on the amp board (the vertical board with the five channels marked as such) made the center channel work for a few minutes after which it goes off. All other channels incl. SW work great.
I assume the issue is in the amp board, so I need some advice on fixing it since repair places are charging anywhere 150+ for even a minor repair.
1. Where can I buy the spare part for this model. It seems that there is a newer Marantz SR-7000 with 7.1ch but not sure if its part will work on the older one.
2. Is it easy enough to replace the amp board i.e. does it require soldering?
3. What would be the cost of the amp board. Would it even be worth repairing or should I just consider buying a new AV receiver?