Please help a technical idiot. I have an old Sharp stereo and one of
the channels in the amplifier doesn't produce any output signal. I
seem to remember that this is a common problem that is relatively easy
to fix even for an amateur such as myself.

If any one has a clue of what to look for, please tell me.

Regards
Svante

PS. Yes, I know I should get a new stereo but for economic reason I
can't do that right now.