i have problem with titan12a amp

[laki]

I exchanged damaged transistor Q17 IRFP4229,after replacing Q17 amplifier worked properly for about an hour.
I checked the transistor Q17 IRFP4229, and I stated that it is broken again.
if there is someone who can help me to solve this problem.
thanks

[diydidi]

Replace class D driver board. It's the small board soldered to the main board.

[laki]

thanks for the message
do you know where i can buy new driver board or may i have to change just IR2011 driver
thanks for answer