Bally -17 locks on solid at 3rd flash, stumped

(Topic ID: 215451)

Bally -17 locks on solid at 3rd flash, stumped


By 80spit

3 months ago



Topic Stats

  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 3 months ago by wayout440
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#1 3 months ago

I had a fully booting -17 mpu, did the conversion to us 2 2716 roms for a night rider, per clays guide, new socket at u8 with a proven 5101 all pins buzzed out correctly, then changed out U9 ( 4011) gets to third flash and locks on solid, swap PIA's no change, Just wondering whats going on, kind of stumped on
this one, any ideas?
Thanks
Gerry

#2 3 months ago

Did you ohm out all the data/address/R&W lines for both continuity and shorts?
Don't know if you've seen this thread or not, perhaps a clue:
https://pinside.com/pinball/forum/topic/need-some-help-with-mpu-100-3-flashes

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