It looks like both boards have to be mated in order for the everything to work. The audio circuitry is on the top side of the bottom board. I might be able to probe a couple of points, but not many. See the photo. It may look bigger than it is in the photo...I'll definitely need to make a 90deg probe tip, but getting it in there to the right spot will be quite difficult.Are you able to get voltage readings?
So you were reading 0 volts? If that's the case check pin 7 with the ohmmeter to ground, suspect C106 is shorted.One failed. Pin 7 (bypass) of the 386 amp.
by Jake Hertz
by Jake Hertz
by Duane Benson