MA Audio

Perhaps someone can help me with this.

I am working on a MA Audio HK 4000 Class D amp with a power supply problem. The issue is it goes directly into Protect when the remote is connected.

The IRFP 064's are not shorted, and I removed all the IRFP 9240, 240's. So the issue is somewere with tl494's circuits.

Anybody might have a schematic.. or close