That worked guys thanks! At first I tried it with an Activision cart but nothing changed. Tried another one and after a few attempts the concord was up. The first cart still won't play but I'll try to get a better look at the contacts in it. This console was stored in no Texas attic so it's nasty inside. Any advice for general clean up inside. Is it oK to spray some contact cleaner through the switches? I was thinking a light q-tip swabbing OD the rest of the circuitry to remove some of the dirt etc