The only thing I can think of that would make a boiling sound is the main capacitors.
If the main caps go bad and don't short out, the FETs will blow the first time you give them some power.
I wonder if they used cheap main caps? That would be a mistake.
If the main caps go bad and don't short out, the FETs will blow the first time you give them some power.
I wonder if they used cheap main caps? That would be a mistake.