Game was working fine before I installed a socketed 6264 NVRAM from Pinitech. Now when I turned the game back on after plugging all the cables back in, the only activity I see on the CPU board is the three lights which turn on with the one in the middle blinking. The LED's on the other boards all light up fine. The GI, controlled lights and DMD don't light up. I'm wondering if the old RAM isn't a 6264 and is a 62256. The old unsocketed RAM IC is marked LH5268A-10LL. Any thoughts on other causes why the game won't boot?