Author Topic: Model M Fault  (Read 981 times)

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Offline Mackembazza

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  • Posts: 1
Model M Fault
« on: Mon, 02 May 2022, 11:25:59 »
I have a late Model M keyboard - p/no 1391406 with 'hard-wired' cable. When connected, none of the keys respond and all the LEDs flash constantly. I tried replacing the capacitor but this hasn't helped. there's not a lot else on the board so guess it could be the large IC (see photos) which, not surprisingly, doesn't seem to be available anywhere. Is there a replacement board/circuit available? (possibly USB?)

Offline sharktastica

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  • Location: Wales, UK
  • CompSci research student, IBMer, r/ModelM mod
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Re: Model M Fault
« Reply #1 on: Mon, 02 May 2022, 15:14:14 »
I have a late Model M keyboard - p/no 1391406 with 'hard-wired' cable. When connected, none of the keys respond and all the LEDs flash constantly. I tried replacing the capacitor but this hasn't helped. there's not a lot else on the board so guess it could be the large IC (see photos) which, not surprisingly, doesn't seem to be available anywhere.

How are you hooking up the keyboard - do you have a dedicated PS/2 port or some sort of adapter? If adapter, what adapter are you using?

Is there a replacement board/circuit available? (possibly USB?)

Unicomp may have a replacement controller (including a USB version).