I have a -35 board that quit working on me in a project Centaur. It started only giving the first flicker and no flashes. I first checked the ROMs and they are good. The replaced the U2 & U6 sockets. Same result initial flicker and the LED goes out. I checked over my work and have given up for the day. Any ideas what could cause the ROM check to be bad other than sockets & bad ROMs ?