Hey, not heard of any hardware issues with the keyboard on Psion NB/P's. You might want to try a
hard reset. This will totally reset your device
(including deleting personal files
), so if you have any files you want to keep make sure to sync or backup to a CF card before doing it.
How to reset:
https://www.manualslib.com/manual/135767/Psion-Teklogix-Notebook-Pro.html?page=16