Quoted from barakandl:
what adds to your problem is that the IC sockets have been replaced once before the battery leaked. people that work on these boards very often know what the expect from the factory soldered stuff. adding the unknown socket rework quality and then battery damage on top of that makes it really sketchy .
2nd look at your pictures.... while you have removed the corrosion, your interconnect is still damaged. The connector plating has been stripped off. Need replaced.
So, the boards didn't come from the factory with sockets?
There are 13 sockets just on the MPU board alone not including the ones on the driver board.
whoever soldered those sockets on looks to me like they knew what they were doing judging by what the back of the boards look like.
I'm no circuit board guru but I know a hack job when I see one.
What do you mean by "makes it really sketchy"?
Do you think these boards are repairable or not?