Working on restoring a 4 player Football. Board kind of boots, but the "field" doesn't look right - kind of skips around and seems randomly put together.
In test mode, it says ROM ok RAM BAD. The manual is useless - it just says basically this means the ram test failed. Duh.
I painstakingly removed, socketed, and replaced all eight 22-pin 2101 RAMs....no change. I replaced the two 2114s...no change. I even replaced some odd 82s16 or something like that that was labeled a RAM on the schematic...no change.
Any ideas?
Thanks,
John
In test mode, it says ROM ok RAM BAD. The manual is useless - it just says basically this means the ram test failed. Duh.
I painstakingly removed, socketed, and replaced all eight 22-pin 2101 RAMs....no change. I replaced the two 2114s...no change. I even replaced some odd 82s16 or something like that that was labeled a RAM on the schematic...no change.
Any ideas?
Thanks,
John

