hackbar
Active member
I have a Midway Galaga machine that recently started not working. When it boots, there's a ton of garbage on the screen and no obvious self test display. Then it locks up hard with a solid tone.
I've made a video:
http://www.youtube.com/watch?v=Rl_TuBIZ_pY
At :07 you can see the "RAM OK" screen flash really fast. I don't see any ROM diagnosis though.
I initially suspected bad EPROMs. I checked them all, and one was indeed bad (dumped differently each time I read it). I replaced it, and also added the free play attract hack (http://forums.arcade-museum.com/showthread.php?t=229972). But still I get garbage. Any ideas?
Also, this cabinet seems to be a repro. The cabinet itself is very nice and clean, probably less than 5 years old. There's Galaga side art and CPO, and the monitor bezel. But the internals have a switching PC power supply and wiring harness that's missing the self-test switch. Did someone make new Galaga cabinets? The boards look original (I've attached a pic). And is there another way to put it in self-test?
I've made a video:
http://www.youtube.com/watch?v=Rl_TuBIZ_pY
At :07 you can see the "RAM OK" screen flash really fast. I don't see any ROM diagnosis though.
I initially suspected bad EPROMs. I checked them all, and one was indeed bad (dumped differently each time I read it). I replaced it, and also added the free play attract hack (http://forums.arcade-museum.com/showthread.php?t=229972). But still I get garbage. Any ideas?
Also, this cabinet seems to be a repro. The cabinet itself is very nice and clean, probably less than 5 years old. There's Galaga side art and CPO, and the monitor bezel. But the internals have a switching PC power supply and wiring harness that's missing the self-test switch. Did someone make new Galaga cabinets? The boards look original (I've attached a pic). And is there another way to put it in self-test?
