Super Pang repair log

Got this original Super Pang PCB from my friend ‘Mikidaffy1983’

He asked me to desuicide it (picture above is actually from the board already desuicided) and, as usual, I followed instruction here:

https://www.arcadecollecting.com/dead/pre-cps.html

All went good but when I tried the board I noticed wrong colors on some backgrounds/sprites:

Studying a bit the hardware I found that the color RAMs are located @8C and @9C (two 6116) so I started to analyze them with my logic probe, this revealed that some data lines of 6116 @8C were inactive.Desoldered and tested it out-of-circuit confirmed it was bad:

Fitted a good 6116 RAM brought colors to normal.