Quoted from Dubesinhower:
Took out the MPU, driver, and power supply boards last night. Other than the corrosion on the battery holder, the MPU looks okay. Another post to follow with issues I found
My MPU looked similar, I can see a couple of spots that need cleaned up on yours. Get those batteries off of there. Mine had enough corrosion that it ate up the battery terminals almost to nubs. I was able to save it by cleaning it up and installing a remote battery box and just running a couple of jumpers to the MPU. I had zero dripping down on the driver board.
I played it for years that way until some how my original ROM L1 chip died I'm curious to see if you have L1 or L2? (edit: I see you have v2) No one sells the L1 ROMs that I could find. I'm not even sure what the diff is between them, I was just sad that my original died. I wouldn't mind having a working L1 ROM again. Anyway.......After replacing that ROM chip, I went nuts and decided I needed to have spare parts/boards on hand so it would always be playable. So....... I bought a complete set of Kohout Enterprises boards (MPU,driver, sound, power). After waiting about 2 weeks and getting ZERO response out of them, even after I paid, no acknowledgement, nothing. I couldn't stand it any more, so then I jumped and bought a complete set of Swemmer boards (MPU,driver, sound, with an Xpin power board) I must have been lucky as I was able to order them all within a day or so of each other. As the swemmer boards arrived I swapped them all in pretty seamlessly one at a time. As I did all that I also added the FP1 speech/board. I love the speech!
Then a month or so later the Kohout boards showed up, so I had to test them. They work flawlessly. But I ended up going back to the swemmer boards just because of the leds he embeds. I thought they looked cooler when I open it up. By then I was hooked, I couldn't stop myself and upgraded the original glass displays to new LED's.
By the time I was done, I had 3 complete sets of replacement boards, and displays.
I'm invested now (I paid $0 for the game originally, so I'm good) I guess I'm keeping this running until I'm dead.