Anyone here a Williams Powersupply guru? What fuse is associated with LED 1? It seems that is the line to run the PCB, is that going to be 12vdc?
Any suggestions on how I may be able to fix this PS as opposed to buying a new one? $39 for a PS for a cabinet I paid $50 for sort of sucks...but oh well.
Mike Ranger is the guru, but he doesn't hang out online much anymore and he got rid of all of his Williams stuff (I know because I ended up with it).
LED1 is +5V, I believe (I'm too lazy to go look at mine) .. it should say on the board.
Check your fuses with a multimeter or continuity tester -- visual inspection isn't good enough. Also LEDs do go bad, so you need to use the MM (although it does sound like you are missing +5V).
Also check/clean the fuse holders as they can corrode over time.
Remember that there are reasons why fuses blow, so you need to find the cause or it will continue to blow.
EDIT: Question -- does LED 1 light up with the game boards unplugged from the power supply ?
EDIT2: Check the connectors for possible scorching.
$39 for a reliable, stable power supply ain't a bad deal. And not worrying about blowing your Video, ROM or Sound boards is nice too.
Cheers.