Machine had Rottendog MPU board, new power supply board, new Rottendog LED display, new speech/sound and game ROMs. Put in the game ROM and CPU from old board and game somewhat boots. Did get a U27 rom failure at times. Get new ROMS from that pinball place and machine won't boot, swap out U27 for old rom and says U26 failure, which is the NEW game cpu rom. Can't read the display either unless it is giving a rom failure. Cannot get ahold of John Wart to see if I can get replacement game ROMs. CPU chips are Hitachi 6802, early production game with PROTO chips. PLEASE help. About to drive me crazy!