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Thoughts on repairing an ADB Keyboard II

John8520

68000
I recently got an ADB Keyboard II along with some other older mac gear recently. It is in wonderful physical condition (minimal yellowing, very clean, no scratches, etc) but unfortunately many of the keys don't work. The numpad doesn't work at all, and only about 2/3 of the main keys work. I know the Keyboard II is the most basic and low end ADB keyboard, but due to it's physical condition I would really like to fix it (I also like a good challenge!)

I have reseated the membrane cable a few times, and popped the whole thing apart and wiped down the carbon pads. The membrane looks good but it's very likely that I'm missing something. Any guidance here would be strongly appreciated, I've never repaired this sort of membrane keyboard before.

Thanks!

 
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