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Keys not registering on JPAC - please help!

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slapaham:


--- Quote from: BobA on December 19, 2010, 01:45:57 pm ---Disconnect one of the wires from the button just in case it is shorted in the switch.

--- End quote ---

Already tried that and it didn't work. :-\ Perhaps something shorting somewhere down the loom? ???

BobA:

Unplug the jpac from the jamma connector and see if you still have a problem that will eliminate or confirm a problem in the jamma loom

slapaham:

Well, I've just tried it with MVS again and no problems... I've tried looking at the connections/loom to see if anything is touching/loose/etc and nowt that I can see! :dunno

It's really odd that when you press p2 b3 it lights the self test LED. That's the only thing I can get any response with. It still doesn't register as a keystroke though. ???

BobA:

Ok but how does the jpac show up on your PC now that it unplugged from the jamma harness?   You can still simulate a keypress by shorting one of the keys on the terminal block to ground and does it still have an error indication. The keyboard pass thru should also work if there is not external problem. If there is still a problem then it is isolated to the jpac alone and it has a problem with its programming or it is messed up.

slapaham:

Hi Bob

I'll give it a go in a bit... thanks for the advice. If I can figure out where the problem lies that will at least help with finding the answer like you said! :)

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