Paradigm didn't supply schematics to these when I worked for a dealer
but a friend asked me to see if I could fix his. I wasn't very
optimistic but I said OK. There was a slight hum when it was turned
on but there was no output of the input signal. If the shield of the
rca cable was touched, the hum increased slightly. I thought the
input rca jacks looked familiar from a repair I did years ago where
there was no continuity from the shield to solder tab.. Some how the
plate the shield of the rca jacks connect to separates from the solder
tab. Without destroying the jack assy., it is impossible to see what
breaks. Running a wire from the shield plate to the connection
underneath the circuit board repaired the amp. Chuck