Fixing your CPU board 101
After installing a switching power supply my
coin door and/or control panel buttons don't work. What happened?
Fixing your blooming problem on your XY monitor
Installing a CR2032 battery kit onto a Williams
CPU board
I'm getting a 1-3-1 RAM error message but replacing
the RAM chip didn't fix the problem (rug test looks OK).
Williams Soundboard issues
Is your Williams ROM board giving you problems?
Williams Decoder Chips replacement
How to replace your ribbon cables on your ROM
and wedge board
I'm Getting a bunch of ?????? on my Defender
setup menu screen
Williams Joust 2 Information
Asteroids and Asteroids Deluxe ROM chip locations.
Need to replace your 18,000uf cap on the Williams
PS?
4 LEDs on the Defender ROM board are on but no
game play
I'll be adding items to this page as time goes on. | 
