I received a DOA Firepower that a lady from a thrift store wanted working. I started by replacing the 40 pin. I got a game working with no sound or speech. Rebuilt a sound board and speech board and all was well. Played a dozen games, left it on in my garage for a while, no issues. I dropped it back off to the owner and she said she had it on for an hour and smelled something, displays were flickering and she shut it off.

I got there and seen a solenoid fuse was blown right away. So I checked sweep on the coils to make sure none were locked up and ohmed out each one and all were fine. Replaced the fuse and had a functioning game, displays were all on except the credit/match field. Display test shows that display and segments are working but in normal gameplay nothing is being displayed in that field, it’s simply blank. You can see a little orange dot at the bottom of the display if you look at it from the top or side.

She wanted it on quarter play so I made it quarter play via the settings and everything was working fine when I left the day I dropped it off. The lockout coil is not wired in. Now after the incident, the knocker for credits isn’t even registering. So I placed it back on free play for her and told her I would do a little research.

No they have not been replaced. I can bounce that off of her and see if that’s something she would be willing to go for.

Got the MPU back into my possession. The chip legs in IC14 just crumbled as I removed the chip so I’m guessing that may not be helping.

Why am I having such an issue finding information on that IC14 chip? I search for the numbers on the chip and can’t find one to buy/burn. I do have a burner and eraser that I’m itching to use so I was hoping I could just buy a chip and run it.

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PINTEC shot me an email with the ROM code.
I ordered three EPROM's and sockets. I am going to start with IC14 as the others look to be in OK shape and I cant imagine those would necessarily affect the display as to not work anymore during gameplay.

IC14 had the significant corrosion on it and the extremely weak legs. I have never burned a chip before, so I am looking forward to attempting to use that this week. The game is about 20-30 minutes from me, so I am going to try and get everything I can done on the MPU before taking it back to her to test out. I am hoping this will solve the display issue.

Well, I "think" I burned the chip?
I went through a few "How To's" on YouTube and verified the chip was blank, wrote the GAMEROM code to the chip and then it verifies.

I dont have the Firepower at my house so I can't ensure its all working. I am going to replace the socket for IC14 at a minimum (started last night and a pad/trace lifted) and go from there.

Well, the chip burning works.
However, I still have no display on that credit portion during gameplay.

When I enter into the test screen and cycle through the modes and screen test, however, the display works. My first picture is supposed to show the ball/match display working, and the credit display not working. The second picture shows that both displays are working and that is in the settings/test mode.

The owner didn’t seem to mind, but I am absolutely stumped and it’s going to bother me

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