First let me say that I am very jealous.
While I have a number of arcade games, I have yet to get a Williams game. The one game I am looking for is Defender which I consider the greatest arcade game of all time.
Anyway, from the sounds of it, you need to determine whether you are getting power at all. So, I would check all of the fuses, connections, etc. Another thing to look for is that arcade games have safety switches on the game. Usually on the back door, on the coin door, etc. When they are pushed in, power is allowed to flow. If they are not pushed in, you get nothing. So, if you take off the back door, or have the coin door open, you have to make sure these allow power to flow. So newbies attempt to tape these to make them closed, but if you just pull out on them, it is like flicking a switch and power will be allowed to flow.
Did you check to see if the monitor was glowing (in the neck of the monitor). It should glow when power is applied. If the neck isn't glowing, either you aren't getting power at all, or the monitor may have an issue as well. Are there any lights on the PCB to indicate that it is receiving power?
I am not sure about repair in Seattle (or even Portland for that matter). I usually try to repair my own boards. If I am not able to, I usually ship them off to someone reliable like:
http://www.elektronforge.com/
As far as parts go, here are the ones I use:
http://homearcade.org/BBBB/ (Bob is the man)
http://www.arcadeshop.com/
Finally, I couldn't find a specific article for the cabinet cleanup. However, whenever I need to do something like that, there are a couple places I go:
http://forums.webmagic.com/ubbthreads/u ... p?Cat=&C=2
The majority of arcade collectors are on this forum. I would post something there, and you will get a ton of feedback. It has always been a major help for me.
http://www.arcaderestoration.com
I can usually find something on this site to point me in the right direction.
http://www.rgvac.com/
Brian is great at arcade restorations. You might want to ping him with a question, he is usually very willing to answer.
Have fun, and keep us updated.
--Raz.