GX-212 potentiometers don't work

[jstone54]

I recently solved a problem I was having amp. It turned out to be very minor, but I blew it out of proportion and took the power transformer out of the chassis. It powers on and emits sound, but it's very low and none of the potentiometers are working now. Anyone have any Ideas?

[J M Fahey]

Do you have 2 GX212 amps?
If not, ask about all problems it may have under the same thread.
Thanks.