TOM said:
Since this morning my pc is responding like the Fn key is permantly being
pressed. The only way to type is to press the Fn key. It is like the
function of the key has been reversed.
Sounds to me like an electronics problem. Maybe the keyboard controller
got the triggering reversed for some reason. Try resetting: Turn the
computer off, disconnect from external power and remove the battery.
That should remove any electrical hangups. Power up again and see if
it's resolved.
If it's mechanical error, and cleaning doesn't fix it, don't despair. On
the portables I've worked with, changing the keyboard wasn't that
difficult. Try looking for latches round the edge of the keyboard. On
many computers you don't even need any tools. (Finding a replacement
keyboard can be harder in some cases.)