Thanks, Trev

I found on that site in post 12 what I think is a schematic of the A7.

As I located the issue without the schematic, I did not try to inject a signal and trace it so I did not really need the schematic this time. Thanks for pointing it out as the next time it fails I may not be so lucky.

Everything is very compact, and without a point-to-point service manual, one would need to be a pretty skilled repair person to diagnose and fix the issue.

This is the problem with solid-state/transistor devices. They are not designed to be repaired, and very often the repair parts are not available. This is true with even very expensive stereo equipment.

Billy