Thanks Len and 33
You're welcome, it's nice to have some appreciation shown.
Everything sounds fine through the cd input.
I don't have a 3 conductor cord for the line out jack, but on the back of the amp there is a 1/4" line out jack that didn't produce a sound through the jack and headphones; however I plugged into the "external speakers" jack in back and the problem persists on the rhythm channel, but still sounds fine on my lead channel
Len since I bypassed the speakers that should rule them out, right?
Probably, but I can't be sure as I don't have a circuit diagram to look at.
I'm starting mu Inspection of the PCB now