Latest bit of solid state repair is a BASH 4.1 system for my PC. This system had a large 60HZ hum and no output.
So I did a bit of digging on the internet and some others had indicated that components in these things are compromised due to heat. After dis assembly this is what I found. A bad 47K resistor that measured zero. So I replaced this with a 2 W resistor.
Finished by installing the amp back in the sub-woofer and did a test and things improved properly.