Yes, thank you. Turns out the switch cable was chewed into 2' sections by a puppy in 1992, so I had salvaged both ends and have had a 6' cable since. That splice got stepped on so was a simple find, but I do need to replace that still. I got caught up with things this weekend and was just happy as a clam that I didn't need to troubleshoot the amp itself.
Thanks again for the help.