I don't have any pictures of the cabinet yet, but it's dirty and rusty. It was sitting in a barn for a number of years, just like all the other restos I'm doing right now.
I don't have any room @ my house currently for the cab, but I knew the board has issues. Since the converted Galaxian cab in my boys room still has the factory harness I knew I could use that to at least display video. We'll refer to this as BOARD 1
I'll doubly document the repairs on another Galaxian board I have. I bought it several years ago from a BYOAC member. We'll refer to this one as BOARD 2.
BOARD 1 had serious problems. The corrosion I talked about? Definitely on the board too. The program ROMs I thought were just a bit rusty...nope. Removed the ROMs to find legs missing and a lot of other legs just fell off. Yikes. Good news is that the ones on the other board are just fine. So I've been swapping them back and forth between the boards when I try something.
Removed the old corroded sockets from BOARD 1 and replaced. Now I have the beginning of the startup sequence come up for just a second, with a red lined screen. I can make out "BAD RAM #1" in the flashes. I know that means I have to replace the 2114 RAM. I already replaced the 245s. I don't have sockets or RAM on hand right now, so that'll have to wait until I get them.
BOARD 2 is also problematic. It appears to not be able to sync correctly. According to the Galaxian Troubleshooting guide I should check out the IC @ 6H. I really need to learn how to use my logic probe correctly. The first time I used it only the green light would flash, but not on all the legs. The second time I got both red and green to flash on all the leads, but one set read completely different from the rest. Theorizing that the chip was bunk I cut it out, replaced it with a socket and cannibalized a replacement from a junk board. It comes up with exactly the same result, so my problems lie elsewhere. :(
I've tried tracing it out on the schematics, but can only find three of the four addresses on the schematics. Of course, this may not even be the problem! I've attached a picture.
(http://www.pealefamily.net/tech/images/P5170072.jpg)