So, I've been staring at the schematics on and off. Without testing each component, I can't properly prove my theory.
I'll isolate this to just one channel right now.
If transistor Q4 (Tip31) fried, and I visible indicators of R5 R6 and R8 are shown bad, I can only assume that all the components in between have been toasted as well.
The right leg of the transistor has been blown apart. All others were still intact.
I've got a Fluke AutoRanging multimeter and set it to OHMS. When testing a resistor, sometimes I'm spot on, and sometimes it's no where near what the loading chart indicates. Sometimes it simply won't even stop at a number. I've also read that the only way to properly test a resistor is to remove one end from the board. So maybe i've been testing incorrectly the whole time?
It also looks like the little ball capacitors might have blown? There is a little black burn mark at the top of each one. For example:
C3 C4 C5
Not sure how to test those?
Not sure how to determine the best way to test the transistors on the board? Q6 Q7 Q8 Q9?