CRC wrote: If there are any 7448s or 7447s in the display I would be checking them first. A number of our early video games use those PROMs and I have not had any failures. You can subsitute an Eprom if you are willing to glomp up interface wiring between the two. Certainly you could read the PROMs and reconstruct the missing data if you were so inclined. I should be able to burn a replacement if you can't find anyone else and can get a blank 82S115 as my Andromeda PROM reader claims it can handle them... John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"