I purchased an upgraded Williams System 3 CPU for my Lucky Seven from another pinsider. Board works and is very clean. He was nice enough to upgrade the board and put newer version Roms. My issue is that the game doesn't boot with just the 3 newer Roms in IC20, IC17 and IC14. To my knowledge it should work like that, right? I get a solid LED on the bottom. ROM/Prom failure. I went out on a limb while trying to figure this out and added the 2 old proms (IC22, IC21) from my original non-working board. The game went through diagnostics and I was able to start a game. Any ideas what I may be missing? // Error: Image 462643 not found //// Error: Image 462644 not found //

IMG_20151012_085549.jpg

1444655423575-1379809712.jpg

It looks like the trace has been cut and the jumper has been done. Looks like its been done correctly. Seems like the chip at IC14 is not recognized.

IMG_20151012_174629.jpg

ROMS that came with board don't seem to work, so I'm simply using my old game ROMS in the updated board. This will work fine for the time being. I hope to pick up new set of game ROMS soon.