That looks better than the one in my Barracora. What is it doing/not doing?

Jason

That's all normal. Nothing odd there at all.
Repair is straightforward.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

From your description, the game isn't booting. Does the 7-segment LED on the MPU do anything at power up?

--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

I would do the power supply first. Make sure all voltages are good and connectors are tight before doing any other boards.

Jason

looks like someone reflowed some pins, but it doesn't look damaged or crossing traces (they could have cleaned out the flux). The aluminum foil looking backplane in the back is normal, every pcb that old is going to do that.

Mpu's can be hard to diagnose, it could be a bad rom, bad relay, bad cap, bad diode (though diodes are easy to check with even a basic MM).

*Edit: just realized you have a driver board, not an MPU. I would go through diagnostics and test the solenoids. If you aren't even getting to diagnostics, as others have said, check input voltages from the powerboard first, then then CPU.

That's pretty typical and very serviceable. Have no fear!

That board looks fine and very repairable. The interconnect probably needs replaced and i always replace the carbon 2w 27ohm lamp resistors with 5w cement ones.

Header pins are a pain on this era of williams boards. The male pins on the interconnector of the MPU are always cracked.d

That board just looks dirty from the normal heat generating parts. Heck, I'd almost call it mint condition.

Well since you have it out (even if it isn't the problem), it wouldn't hurt to go ahead and run through the components with a DMM. All those resistors cook the board. I've had to replace bad lamp circuit resistors as barakandl said because they were bad.
That interconnect connector looks to be lightly toasted. replace it.
If you can get ahold of the pinrepair guide, it gives good instructions on testing out all the various components. Can really save you some time once you get good voltage and get the mpu booting.