I would throw a new power supply in it, dial in the 5v and make sure the board really is dead before sending it out for repair. You want 5.0v or maybe a smidge higher on the chips on the board
Quoted from PinRetail:Eldorado Games for the board repair, but definitely get that power supply replaced.
I use part #80-0002-10 from suzo happ
https://na.suzohapp.com/products/power_supplies/80-0002-10
Looks like they are out of stock right now...
Eldorado Games is:
https://www.eldoradogames.com/
I wouldn't send anything to Eldorado, their turnaround time is atrocious. Try Speedy's https://www.sosrepairservice.com