When I turn it on I get all 4 LED's on the ROM board solid. I read that it might be a bad ribbon cable between the rom and cpu board, but all 40 pins have continuity. The next thing I read was that the 7474 chips near the battery could cause that, so I performed my first chip removal/socket replacement proceedure. I was able to remove the chips and solder the new sockets with no problem, but even with replacing the 7474's there was no change.
If I had a known working cpu or rom board I could at least narrow it down between the two. I think I'll just have to find a Seattle area repair tech.
As for the cost, I figure I've spent nearly twice what it's worth to get it together and it could still use new glass and one of the joysticks have some gouges. Of course they are different than the joysticks used in the upright, so are harder to find.
Turbo6 - what kind of spare parts do you have? The only things I really need are a CPU or ROM board and a replacement joystick handle.
Javeryh - that's not new contact paper, that's laminate. I couldn't find anyplace willing to sell me a small piece, so I had to by a 30x96 piece. I now have enough to recover another entire Williams cocktail. I spent $50 for the laminate, and also bought a laminate roller, laminate trimming bit for my router and glue. I have more in the laminate than the $75 I bought the original project for but I'm ready for any future laminating.
Since I bought replacement populated control panels, I have the original partially hacked ones for spares. I have laminate left over too, hmmm... I guess I could make a duplicate of the cab. I don't know if my woodworking skills would be quite up to it though. I'll have to think about that a little more.