Trying to understand the chronology of it..
You started playing with the ribbon cables because of that repeating sound? I’m not technical so I don’t know where the replacement chips fit into this (i.e. why they were changed too)
Set the game to free play on arrival.
The game played fine as far as I could tell, but it kept playing this irritating sound over and over, then intermittent. Because I don't know the game that well, I actually thought it part of the game, but annoying..., until I played another Getaway and realised mine was off.
I changed fuses 5 or 6 days after I got the machine, they arrived from Pinball Mania. Just because they were wrong, nothing to do with sound investigation.
I started to trouble shoot the irritating noise and thought the cpu at u13 might be a cause, I was shotgunning the problem, as I didn't have a reasonable test to give me any direction.
I read about the ribbon cable, it looked new, so thought that could be a problem in some way loose or such.. Pulled that, cleaned the pins on all the boards with a cotton bud and a bit of rubbing alcohol and reseated the ribbon, pulled the chip at same time (as it gave me better access) and replaced with (wrong) spare..(Learning, do one thing at a time for testing)
2x fuse blow on start up, replace. Blow again.
Took ribbon off again and triple checked it was correct and pushed home, from advice here..
Took out J107. Restart. No fuses blow.
Restarted with J107 and coin door open. No fuses blow. Closed door, no fuses blow.
Cable reseat probably was the fuse issue as suspected here.
Realised still no sound. Chip is wrong one.
Dropped some coins through the coin slot, see a switch on matrix for coin staying on after drop. But no sound to check if it's playing irritating sound coz that switch is stuck
Current situation.
Have correct chip on order, I want to trouble shoot this and see if we can clear the irritating noise, before the pinsound goes in.
I need to do one thing at a time, so I can isolate. Is my learning.
Once I get the chip, I'll get sound and we can get back at the irritating sound problem
Fuses were a diversion to irritating sound, caused by ribbon cable, I guess.
Well that was a mouth full!