I have a RF Punch P400X1 and I ran into an issue where I wasn’t getting any audio out of the amp while it was connected. I started throwing parts at it and replaced the rca input jacks, and all of the transistors that sit on the heat sink. Didn’t change anything. I will go back and check to make sure I didn’t bridge any connections, but I don’t think I did. Any suggestions for next steps or diagnostic tips? I do have the schematic for the amplifier (attached below) and I will attach some photos
