My amp suddenly going silent when volume knob touchedi have a ordered


I have a pre owned Rotel RA1070 that’s been working fine. Tonight, twice, I’m listening to jazz, wife sleeping, so I go to turn down volume a touch. The minute I touch the knob the sound goes dead. Amp, CD okay running, cables fine, speakers brand new MA Silver 2 .
I turned off the amp, waited 10 seconds, turned back on, everything running, sounding normal. Later on, I get up to turn down volume, same thing, sound goes dead. What’s happening? Seems to happen when I touch the control, before I even turn it down... Almost like a mini shock
sifter

Showing 4 responses by sifter

Sold my 1070, have had a few different  brand amps in here with no issues. Just picked up a nice sounding  vintage Rotel RA 1060.... same issue. Zap, no sound, LOL. Must be Rotel, other brands not exhibit, same living room, same conditions.
Very interesting to see what possible causes could be. I'll to try grounding myself first. If no help, than tuner cleaner would make perfect sense. Thank you.