I bought an NVRAM chip for pinbot a while ago and just got around to putting it in. I removed the batteries from the battery pack (but didnt unsolder or remove the pack itself yet). Then, I unsoldered the U25 chip and soldered in the socket. I then plugged in the NVRAM chip and put the board back in Pinbot. When I turn Pinbot on now, the lights turn on, but the cpu is locked up (game doesn't boot, nothing on the displays, etc.). I checked that the board is getting the correct voltage (and it is). I also checked and made sure that the chip was getting continuity to the correct locations on the board at each pin. The game was working perfectly before I installed the chip, so not sure what went wrong. Anyone have any thoughts?
Appreciate your help.