Kenwood kac-9105d burn irfp250n

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Oky I think I should check the components after the L2 because apparently there comes something short there when turning it on I mean that if I remove the l2 there is no contact with the following components to this, some transistor that has a leak or a damaged diode since it turns on it has a delay and as soon as it manages to light it well it burns the mosfets and without the L2 it turns on normal I mean that it does not have contact with the other components I do not know if it understands me?
 
The inductor could be shorted. It could also be a shorted capacitor but that should have showed up when you read 3k across the speaker terminals.

While a small transistor could be shorted, it's not likely to cause an FET to fail because they're all isolated by high value resistors that would protect the FETs.

Without the inductor but with the FETs in the circuit, can you see the AC voltage on the input pad to the inductor change as you vary the input signal level?
 
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