Looks like there are a lot of Parasound enthusiasts on this forum!
A strange thing happened last night with my HCA-2205. I was adjusting the H.F. horn attenuator on an Altec Valencia crossover and a spark zapped between my arm and the horn. Now the 3rd amp channel doesn't work - dead silent output, and the overload LED is lit. Measured the speaker, it's at 4.5 ohms on the amp input side, and when you adjust the L-pad to the bottom for the horn, it jumps to zero. I think that's what took out ch# 3. Pulled the cover and both fuses on the board (rear middle of the amp) are good. Any easy solutions to this, or did I take something out? Does anybody have a copy of the 2205 schematics?