Any common Gorf issues?

[NightGod]

I picked up a Gorf cabinet off of Ebay-seller listed it as non-working with some water damage. From what I can see, the majority of the damage appears to be external, with just a bit of rust on the service cut-off switch and some water damage to the transformer body. Side art is pretty hosed, but the top marquee, bottom marquee, screen bezel and front plexi all seem to be in good condition-a few nicks here and there, but overall pretty good for something 25ish years old and with almost 50,000 plays on it. CPO kinda pisses me off because it looks like someone tried doing a conversion to it and stopped when they realized it was stainless steel-there's the begining of a hole being drilled in there. Annoying because otherwise it's not it too bad of shape. A bit of surface rust, but in better shape than alot of them I've seen. Ah well.

Anyway, I did a quick check and noticed that the power cord had been spliced at some point and a REALLY horrible job was done-the splice was falling apart, bits of copper wire pointing all over the place. So, a few wire nuts and some electrical tape later and I had a lit monitor! Replaced one of the bulbs inside, just to get that arcade feel and started playing around trying to figure out the problem.

Threw the system in test mode (I think....the sticker for the switch is missing, either way, I changed it) and it went from the blocky static you see in the first screen pic to the more grainy one you see in the second. No clue what that means-would appreciate any input there. A definate answer on which direction the switch has to be flipped to be in test mode would be awesome, as well. No game sounds, but I can hear the speakers crackle a bit when I adjust the volume pots, so they seem to be at least basically functional.

Pulled all the boards, no visible damage. Tested all the fuses I could find, all seemed OK. Really, the biggest thing I see is that messed up transformer.

So, to narrow the focus a bit, I'm hoping for some feedback on a) best way to change out that nasty looking transformer. I have a half-dozen or so good PC power supplies lying around, so using one of those would be the ideal, I just have no clue on where to start and b) any common problems I might be able to check beyond the basics I listed. I'm a PC tech more then a board-level tech, but I know some basics of multimeter function (and own a pretty decent DMM) and pick up new stuff pretty quickly, so I need basic guidance and I should be able to jump in once I know where to start.

[NightGod]

Bump since it fell to second page.

[TOK]

If you have newsgroup access, go to rec.games.video.arcade.collecting. There are people very sharp there at troubleshooting individual machines.