Cheers! This is what I meant so many times when I advised people to put it aside and just build a new kit. It is far harder to repair one than to build one from scratch. Or at least it takes much more time and skills. The latter will come from building a new one...
The numerous amps I had given up on that I managed to repair later on to prove the theory.... Just put it in the drawer and start over, much more fun, much more chance of success....
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Pics can help a lot to diagnose something from any place on the globe...