I'm new to the forum and hope I can get some help with my "close encounters of the third kind" pinball machine. I want to restore it into it's original state (kinda in honor of my grandfather who recently passed away).
I'll try to be as thorough as possible. First time I booted close encounters nothing worked except the displays.
After opening the backbox the known issue of the leaked battery was clearly visible. I then changed the battery into an original (varta instead of data) and replaced a bunch of resistors, diodes and repinned almost everything of the MCU board. After that I put the MCU back, I was very happy as flippers, drop down, sounds, roto target all worked, everything seemed to work except the displays.
But now, the game seems to be stuck in some kind of game state... The moment I push the "ON" switch I can immediately control the flippers and basically start playing without putting in a coin. The drop targets don't reset and roto target also doesn't work. I think i've measured all possible voltages which are OK, all fuses are OK. I don't think the MCU is dead but just stuck in some kind of mode and it can't be reset. I believe it has something to do the with the reset circuit...
To summarize after pushing ON button:
- flippers work
- poppers work
- drop target and roto target doesn't work
- outhole doesn't "reset" the game
- All voltages are OK (MCU, PS, Display)
- Displays don't work
I hope I was a bit clear on the problem and hope someone can help me out.
I also made a quick vid and put it on youtube:
Thanks in advance!