plz help me for shark amp class d mono

[tarique]

i m having problem with class d mono amp ,shk 3001 going into protect mode , showing red led , i change mosfet irf 540n but its burn again and again , there is no any short circuit in that , so what can ido plz helpme for that ,thanx this pic of amp ,

 

[jlithen]

I see this is very old, but for future reference.
I would check or replace the driver chip for the mosfets and make sure all mosfets are good before attempting to power on.
Powering up with a small lab power supply at first is a good idea.
I bought two 0-160VDC Siemens lab PSUs really cheaply and with those I can get any symmetric voltage for a solid state amp, as long as current consumption is low