This guy had been kicking around in my big box of junk since January.
I bought the A+B board set for approx $US120. The A board worked perfectly right away - and $120 for an A board isnt a terrible price in my country - so I was happy to call it even at that point. The B board had a leaky battery which was beyond my ability and tools at the time so I put it to one side to fix later. Later has arrived
Here was how it looked back in Jan - most of the damage was around the battery 10L and 10M, a little bit up by CN6, and a little bit up by the jumpers JP4
After a quick clean with some IPA it looked like this
Then I gave it a bath in vinegar, then in deionised water, then in IPA - after some time in the dehydrator it looked like this
So the 74LS254 at 10M is had it, but other than a tonne of traces and vias it looks like this board may have escaped serious damage
So I patched up all the bad traces that I could find, repaired all the busted vias, and put an infinikey on and... It boots, and passes tests even!
Next thing is to fix the sprites (there are none), music (there is none of that either), and sounds (present but crackly)
I'll probably see if I can find a donor to replace 10M and see if that improves the situation.
For those that come after and may read this I took a lot of inspiration from here
https://www.arcade-projects.com/threads/cps2-a-board-restoration-from-death-to-life.12444/
and here
https://fluxcore.nz/blog/cps2-repair-battery-damage
and here
http://forum.arcadecontrols.com/index.php?topic=160428.0
and of course the many awseome threads on this very board
I bought the A+B board set for approx $US120. The A board worked perfectly right away - and $120 for an A board isnt a terrible price in my country - so I was happy to call it even at that point. The B board had a leaky battery which was beyond my ability and tools at the time so I put it to one side to fix later. Later has arrived
Here was how it looked back in Jan - most of the damage was around the battery 10L and 10M, a little bit up by CN6, and a little bit up by the jumpers JP4
After a quick clean with some IPA it looked like this
Then I gave it a bath in vinegar, then in deionised water, then in IPA - after some time in the dehydrator it looked like this
So the 74LS254 at 10M is had it, but other than a tonne of traces and vias it looks like this board may have escaped serious damage
So I patched up all the bad traces that I could find, repaired all the busted vias, and put an infinikey on and... It boots, and passes tests even!
Next thing is to fix the sprites (there are none), music (there is none of that either), and sounds (present but crackly)
I'll probably see if I can find a donor to replace 10M and see if that improves the situation.
For those that come after and may read this I took a lot of inspiration from here
https://www.arcade-projects.com/threads/cps2-a-board-restoration-from-death-to-life.12444/
and here
https://fluxcore.nz/blog/cps2-repair-battery-damage
and here
http://forum.arcadecontrols.com/index.php?topic=160428.0
and of course the many awseome threads on this very board