I ordered new Q1 and Q2, once I receive them and have them installed I will scope pin 10 and post a picture here ...

Hello everyone!

I recently bought a broken Ampeg Portaflex PF-350 bass amplifier head in unknown condition. As it turns out, it's completely dead. Tried powering it on with the dim bulb tester, dead short.
I have attached the schematic below.
What I found:
TH1 is cracked visibly but measures 6 ohms. Will replace it but should be okay for testing for now.
Either Q1 or Q2 was dead shorted. Don't remember which one but one of them. Both are FQPF12N60C. I replaced both with SiHP18N50C to test as I had these on hand. They are the same package, pinout, mosfet type....