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geekhack Community => Keyboards => Topic started by: HanSoloCup on Sat, 29 September 2018, 21:17:24

Title: Keys Not Registering on 122-Key Model M
Post by: HanSoloCup on Sat, 29 September 2018, 21:17:24
Hey everyone! I just made an account here because I need help with a terminal Model M I bought recently. Its missing 3 key caps and was in some pretty rough shape when I got it, but it seemed like a good deal for $30. After doing some cleaning it was looking good, and it didn't really seem like it needed to be bolt-modded to me. After making an adapter for my Teensy 2.0 to use Soarer's Converter (which I have checked over and over and have confirmed to be 100% wired correctly), using HID Listen showed that a bunch of keys weren't working.When I pressed them, nothing happened at all, not even an incorrect register. Below I have pictures of my setup and anything I thought could be useful. Thanks!

(https://i.imgur.com/W0ginJe.jpg)
The keys that aren't working highlighted in yellow.

(https://i.imgur.com/C0v9IrI.jpg)
The model info on the back of the case.

(https://i.imgur.com/QbQ2PJO.jpg)
My setup for Soarer's Converter (I have a case for the Teensy on the way, and I am absolutely positive everything here is wired correctly).

(https://i.imgur.com/j4KHehy.jpg)
The PCB.

(https://i.imgur.com/s9RmqLu.jpg)
The longer connector's contacts.

(https://i.imgur.com/V3Cx9mU.jpg)
The shorter connector's contacts.
ππp
(https://i.imgur.com/8ptY6QO.jpg)
The shorter connector seems to be attached to the larger one, but it looks like it's coming off.

Thanks again for any help and advice!
Title: Re: Keys Not Registering on 122-Key Model M
Post by: jim121049 on Sun, 30 September 2018, 01:23:09
From the symptoms that you describe, and cross referencing to the Model M 122 key matrix, my guess is that you have more than one break in your membrane.