Hi there - I have a JVC JA-S22 amp which I bought used in 1980 with matching record deck and Wharfedale speakers. I washed dishes all summer to afford it. Later added a CD deck and changed the speakers for smaller, more powerful ones. Last night, the amp stopped working mid-track. There was a slight pop, and no more sound, although the unit still has power. Not working on the CD or the deck. Just nothing. I changed the fuse on this amp once about twenty years back, but am assuming that this is not the issue this time, as it has power. That is the extent of my electrical knowhow. PLEASE HELP!