Soundmagus vs1500 protected

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Hello

I have a soundmagus VS1500 amplifier REV. E. I arrive with burned transistor of power supply
I have removed all the MOSFETs from source
I have changed all the gate transistors, 47ohm gate resistors and TL494.
When switching on the amplifier, it is protected. Turn on red light and blue blinking.
I have also retired the circuit drive ouput, but it is still the same.

Can it be the mute or protection circuit?

Greetings
 
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