Repair Help need for Sinulive SLA-1500

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Hi repairfriends,

income a Sinuslive SLA-1500 for repair.
What the Problem: Many Transistors of pa and of the dc-converter explodet or burned.
i have changed all mosfets and burned resistors i found. also an smd transitor found was dead and changed.
I have unsolderd the Diodes to look the function of DC-Converter. 8V up the powersupply of my bench goes to short circuit. Which Points i can search for faults?
Any ideas? The schematic is on my bench.

Thanks….

Heiko Hinke aka Funkbase
 
Pictures

This Pictures from the Gate-Resistors.
 

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