I have an Infinity Basslink in my Suburban that was making an occasional thump while playing like the mute circuit wasn't working and it was self power cycling. It played though but does not any longer. I get a power up light but no sound. I took the mother/main board out, think the problem is there. I've found a shorted diode (D108) and some off value resistors. If you look in the pic it happens to show the discolored area of the board I'm looking into. I was hoping the diode was a 1N4148 but it's not, will have to see how many of this vintage parts are available, main audio amp is a class D made in China special, replacement cost is $15, I don't think it's the issue tho. Any comments/suggestions would be appreciated, I'll post my progress if there is any HA!!!