Neither cab worked at all; only 1 had any picture, and the display showed a video ram error. The other PCB was also failed with a backup ram error. I immediately cut the stock backup battery out of both PCBs and fortunately, neither showed signs of acid damage.
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My first goals were to take inventory and source parts that couldn't be repaired. Both cabs had K7000 19" monitors, Beta had a k7000-A variant. While this variant is somewhat maligned because of a un-obtainable flyback, my personal experience is that the construction of the this variant is a bit more robust. Probably why this monitor was working, while the vanilla k7000 was not.
I gave both PCBS a good cleaning. Right away I noticed some corrosion in the backup ram area on the "B" cab PCB. A scrubbing with some IPA resulted in a functional PCB! It was a much-needed early win! Unfortunately the next day it threw up the same backup ram error, so I did some continuity testing and discovered a faulty trace, which I repaired and the board worked great!
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The other PCB was a different story. With some help from the folks at the neo-geo forums I identified the faulty video ram chip from the error code. After replacing the ram chip, we are 2 for 2 on PCB repair!
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