Did the replacement of the FQB30N06L fix the problem?
Is the instrument working again?
Unfortunately, it's not just about transistors. As you can see above, the board under the transformer is charred. I have to rebuild the board or make wire tracks.
To show the possibilities, I have not yet found a single program that can control the device
LabTracer 2.9 is free but I can not download it.
I would be grateful for any tips on software that supports the 2600 series without a letter.