HP-27 Repair/ACT/Panamatik LP?

[teenix]

(10-09-2018 06:55 PM)Maximilian Hohmann Wrote:  The only problem is the the "1" key which does not register but I hope that this can be remedied with some contact cleaner applied through the holes under the keys.

It might be possible that the through hole via on the keyboard pcb is open circuit due to corrosion. See attached image.

This looks to be a direct keyboard matrix connection to the "1" button.

If so, it might be difficult to repair without a keyboard dissection.

cheers

Tony