The "cold" (not mains connected, see photo) side of the power supply appears to have jumpers on all the outputs. It would be fairly easy to just snip or desolder one end of these, one by one, to see if opening a loop allows the other voltages to come up. A repair would then also be very easy. Does that plan make sense?A test you can do on the secondary is check it for shorts...
I guess I'd start with the 126v loop (jumper JP065, upper right) since the others are fused, and all those fuses are still good.
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