Pit -Fighter 3 Player PCB - Positions 3 and 4 in the high scores table are not being permanently stored when turning off the PCB

[RColtrane]

I have an original Atari Pit-Fighter 3 player PCB and every time I turn it off the scores for slots 3 and 4 are being erased. When I turn the pcb back on, slots 3 and 4 go back to zero. I suspect the correct behavior on shutdown is to store the first 4 scores while the others are reset.

My question is, which chip is responsible for storing the 4 top scores and what should I do to make it work again?