Heureka! I think i have fixed it(knock on wood).I have re-solder the whole board. On quite many of the solder joints the solder hade not gone through the board at all. I’m pretty sure the problem was the through-hole plating. That is why the board was so sensitive for pressing down on it
Now i have played on it for a few hours. I have pressed down on the board quite hard and taping on it. Much harder and more than before.This treatment would definitely triggered the protection before i re-soldered it.
One mishap in the repair. When i started up the amp the right channel did not play. It turned out to be a capacitor that hade shorted out. It took me about an hour to find the little one.
I will post an update in a week or two.
Now i have played on it for a few hours. I have pressed down on the board quite hard and taping on it. Much harder and more than before.This treatment would definitely triggered the protection before i re-soldered it.
One mishap in the repair. When i started up the amp the right channel did not play. It turned out to be a capacitor that hade shorted out. It took me about an hour to find the little one.
I will post an update in a week or two.