21 Sep
2020
21 Sep
'20
5:08 a.m.
On 9/21/20 4:41 AM, Tom Hunter via cctalk wrote:
I cleaned the now exposed membrane using Isopropyl
alcohol - no change in
resistance.
https://deskthority.net/wiki/Membrane_keyboard#Spring_over_membrane
you exposed the top of three sheets.
the contamination/deformation is between the two outer sheets
many people have complained about switch failures in osborne keyboards
it is probably corrosion between these switch layers
you might be able to change something if you can inject a solvent into
the side of the switch by drilling through the top layer, but just a
solvent on top will do nothing