/diy/ - Do It Yourself

>>908323
That board would have seen thousands and thousands of heat/cool cycles, over time this can cause the solder joints to fracture from constant thermal expansion and contraction. It is likely there are fractured solder joints all over it, which may be breaking the circuit. Rework all the solder joints on the board and see how you go. Be very careful to apply only as much heat as you need, and get the joints reworked as fast as you can. Tracks on boards that old need no excuse to lift away from the PCB, especially in a board that has seen as much heat as that one.

I also notice that all the lamps seem to be supplied from one point, the circled coil of the mains transformer. Get your meter out and verify this winding is delivering power, if so get your meter and follow the wires/tracks till the voltage disappears. There will be your problem.

That's a beautiful old amp man, you're doing gods work restoring it. Good luck.