Pinball Wizard
Well-known member
I have a Space Zap game that is currently dead. When it is powered up, the screen has nothing on it except you can see a very, very faint snow pattern on it. The test switch makes no difference to help me out. The boardset is VERY similar to Gorf with 4 of the boards being shared (of the 5 in Space Zap and 6 in Gorf) so I have narrowed the issue down to the Space Zap Game board. All 4 RAM chips on the board are good (verified in another game) and the custom I/O chip was also swapped with a known good. What's my next step? I would like to verify that the PROMs are good (I have the 4K set not the 2K set), but am unsure how (if I can) put them in my EPROM burner to at least verify them. Suggestions on that too?