Quoted from locksmith:Blew up my walking dead cpu/sound board last night when it was plugged into a non grounded receptacle. Unreal. Now I’m looking for a new board 520-5337-01 Rev A. Called Marco ,Pinball life,K’s arcade with no luck. Will any other Sam boards work for replacement. Thanks
[quoted image]
It might be just the audio chip itself U50, it happened to me on the U51 chip next to it which is for the bottom cabinet speaker, yours will be for the top speakers Hard to tell on the pic, the flash on the pic is making it tough to see, but I am thinking the audio chip blew, and is where the extra black soot went on the rest of the board. See if that soot wipes off the board to make sure that is not actually burned up and check the audio chip for burn marks/holes ect.
If you can solder it is a pretty easy fix, if not comfortable contact Chris, because to buy that board new is $600.
Here is a Thread of my problem and how to repair. Pay attention to when Pinwoofer got into the thread, that is when I got my answers and solved the issue: https://pinside.com/pinball/forum/topic/bottom-cabinet-speaker-hum-