I have a solid state harmon kardon from 1976 and the amp boards are not putting out any audio rather one chanal puts out 38 volts. system max voltage at comstant appears to be 82 and max output when it puts strain on the caps is 160 and I so far cannot figure out why it has quit on me or why it doesent have any sound and one chanllel is at a constant 38 volts this is my favorite audio system ever and I miss its beautiful sound