09-14-2011, 09:10 AM
First have a look for any burned resistors or evidence of arcing. Then check out the wiring to the speaker field coil and output transformer to rule out any short circuit to ground.
It is also possible that one of the filter capacitors has failed even after only a few months of service.
It is also possible that one of the filter capacitors has failed even after only a few months of service.