I just came into possession of an arcade cabinet. It's a genuine Nintendo Super Punch-Out!! cabinet from 1984 (i.e., almost as old as me).
Here it is, in its new (temporary) home on my covered back patio:
I haven't had a chance to get inside and poke around yet, but I plan to check the monitors' capacitors to see if they've leaked and/or dried out, which would necessitate recapping them, and I intend to pull the actual game boards and see if they've suffered any corrosion from on-board batteries. If all is well there, I'll try to actually plug it in--which will require attaching a new plug to the currently-bare wire-ends--and see if the transformer and power supply are still functional. I will also take apart and clean the coin doors, since they're a little janky, as well.
I'll update this post as I learn more :)
I opened it up and was pleased to find that the batteries didn't seem to be terribly corroded:
I drove my board out to test it in the aforementioned known-working cabinet and the results were less-than-great but better-than-bad:
For the eproms, I'm hoping to borrow a USB programmer from a computer engineering professor at the university where I work. If that doesn't pan out, I can get one on eBay for $40.
It was looking like getting SPO!! working was going to be more involved and expensive than I was really hoping to get into, and I didn't want to risk ruining a board that could actually make a collector very happy, so I traded the boards and cabinet to a really swell collector named Marv for this dandy of a JAMMA cabinet: