NVRAM board replaces 6116 SRAM chip, no batteries necessary WPC MPU 89 which is a Bally part

which is a Bally part number A080-91895-B000 or A080-91895-C000

You must know what you are doing and have a working board first

The center board is quite large

Best of all

Your game may be similar

NVRAM board replaces 6116 SRAM chip, no batteries necessary WPC MPU 89 which is a Bally partBatteries, oh, batteries. The damage that you do. This product simply replaces the 6116 SRAM chip. You can plug it into a socket, or solder it in directly. If the socket, it MUST be a new one. This part will not repair an MPU that has other problems, or damaged traces. You must know what you are doing and have a working board first. You get a 60 day warranty with replacement only.