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I have a working ION 2008.5 that I just got working again after spending a year on the shelf. I am worried about the key battery dying. Has anyone ever tried to solder a new battery in parallel with the current battery? Seems to me if that could be done, it would prevent the key from dying. What...

The RAM chip at L9 is a Sony CXK58256MM-12L

I have a 4-Slot Neo Geo with a video RAM error. Address Write Read 0000060F AAAA AA2A I think it is the RAM at L9. Can somebody confirm that? If so, do you know where to get a replacement?

Thanks for the help. I bought this machine with several problems I am working through. I am sure it is not the connectors since I have a second working CPU board that does not show the problem in the same cab with the same ROM board. I will try the cocktail table mode debug method. Thanks.

I have a Stargate CPU board that has a video color issue. The game works but the screen is tinted all red. I know that the ROM board works because I have tested it in another CPU board and it is fine. Any ideas for my to try? Thanks.

Got one coming. Can't wait to install it. Thanks.

I am looking for a working Defender ROM board with ROMs. Let me know if you have one. Thanks.

I changed to a different power supply and did adjust the -5v up to -5.1. Seems to boot now every time. Thanks for the suggestion.

Thanks. I did watch that video before I posted. I thought that might be it. I dialed up the -5V line to be exactly -5.0V. It booted and ran. Then, after sitting for an hour not powered up, it would not boot. It is weird. When it boots, it boots all the time. Then, it never boots. That is the...

I picked up an MK2 that is not working. It looked like the PSU needed to be replaced because the 5V line was dead. I replaced the PSU and the new PSU 5V line was dead too. I disconnected the 5V wires and I read 5V. Reconnected the wires and removed the JAMMA connector and I get 5V. I organized...

Nevermind. I found a post that says this is also a Wei-Ya M31. Found the manual for that. There is a trapezoid adjustment on the chassis. Small twist of that adjustment and the image is perfect.

I have a Billabs BL24C90T in a Golden Tee that looks great except for significant trapezoid. The remote board has pincushion adjustment but no trapezoid. I am looking for the manual or if anyone knows if there is an adjustment on the chassis. If not, what parts need to be replaced. Thanks.

Chris, I am in need of a working PP1 too. I just picked up a pretty nice cab. The board is damaged so I am looking for a working one. Let me know if you have another one. John

I have a nice DK machine that has intermittent loss of a vertical lines of graphics in the barrels and/or DK. Everything else os OK. I have replaced RAM and ROMS. Could it be the PSU? The +5 is a little low. The -5V and 12V are right on. There is a KGD-23S PSU in it. Does anyone know if there is...

Thanks. I found another post which said too clean and adjust the switch. I did that and it works great now. Thanks for the reply and info.

Replaced the bad transistor and replaced the burned coil for the lower left ball gate and it works now. Thanks for all the help. Does anyone know the rules for when this gate opens and closes? It opens and closes often and sometimes it seems that the game does not know it is in the gate. The...

Thanks. I found the transistor on the schematic. I am placing an order for replacements.

Thanks to everyone for the replies. I have the first 20 issues and loved them. Ostrander is great! I followed his work which led me to collect the comics. I am not very experienced with pinball repairs as I am with arcades. What transistors?

I just picked up a nice Stargate. Everything is working except the lower left ball gate. The previous owner said it never worked and he removed the arm. I installed a new coil and arm. I wired it exactly how the old coil was wired. The coil is immediatley energized when you turn it on. I went...

Does moving the yoke forward or back have any affect?