1941 : Counter Attack repair log #2

Got this 1941 : Counter Attack (Japan release) B-BOARD for repair:

Game had some graphics issue on backgrounds:

I swapped the C-BOARD with the one from a Street FIghter II : World Warrior which mounts the same ‘CPS-B-05’ ASIC :

GFX issue disappeared so the fault was in the C-BOARD :

I was asking by owner to transplant the ASIC from the donor C-BOARD to original one, here’s a step-by-step collage:

The operation was successful :

Board 100% fixed and aesthetically like genuine, appearances count too…