Arcade Collecting > Restorations & repair
Ultimate mk3 controls not working
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tealsnk:
I recently purchased a ultimate mk3 pcb board, I installed into a mk4 cabinet. It boots up fine, however none of the joysticks and buttons work at all. I thought that that the kick harness for mk4 and umk3 would be the same and would be plug n play. Any ideas as to why the controls don't work at all. Thanks

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Titchgamer:
If none of your controls are working at all the first thing I would check is the continuity of your ground loop for them.

After that its cracking out the drawings and doing it wire by wire....
tealsnk:

--- Quote from: Titchgamer on October 30, 2019, 02:45:32 am ---If none of your controls are working at all the first thing I would check is the continuity of your ground loop for them.

After that its cracking out the drawings and doing it wire by wire....

--- End quote ---
Ok, I may give that a try. Weird part is that mk4 ran great before. After not having any luck with the umk3 board controls I put the mk4 board back in and it plays perfectly. Maybe umk3 board issue?

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Titchgamer:
Possibly a board issue or its wired totally different.

Are they both Jamma boards?
tealsnk:

--- Quote from: Titchgamer on October 30, 2019, 07:13:39 am ---Possibly a board issue or its wired totally different.

Are they both Jamma boards?

--- End quote ---
Yes, both are jamma boards. One thing I did notice is that the pin connectors on the umk3 board are very worn out where the jamma harness slides on. The silver on there is almost gone on quite a few. Not sure if that would cause the controls not to work. My understanding is thay mk3, umk3 and mk4 have all the exact same harnesses.

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