They don't look defective.
Confirm that one of the 2552s (preferably a new replacement but...) reads infinite resistance to the other two terminals. If one reads infinite resistance, install it in place of the negative rectifier you have installed and clamp all FETs to their heatsinks and power up with limited current (no more than 10 amps). Does it power up?
Confirm that one of the 2552s (preferably a new replacement but...) reads infinite resistance to the other two terminals. If one reads infinite resistance, install it in place of the negative rectifier you have installed and clamp all FETs to their heatsinks and power up with limited current (no more than 10 amps). Does it power up?
I'm asking you t check the FETs that you showed (out of the circuit) earlier. And then install one that's still OK in the place of the negative rectifier.
Does it matter which rectifier i replace?I'm asking you t check the FETs that you showed (out of the circuit) earlier. And then install one that's still OK in the place of the negative rectifier.
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