Hi

One thing to try if you are ok with the interior of the keyboard.

Open it up and unplug and replug the connectors back into the boards. Sometimes with moving the keyboards about the connectors become slightly dislodged. This makes the connections intermittent and could cause problems. I have not had your problem but have had various others and after doing this it solved them for me.

I would suggest then downloading the operating system again from the internet and reloading it.


Dazza