A few keys don't work properly on Portege S100 keyboard

I'm having trouble with my S100's keyboard. The s, d, g, j, q and a few punctuation marks don't function at all. I've had problems with them before that have sorted themselves reasonably quickly, but now it appears "permanent".
A USB keyboard works fine. I have also replaced the keyboard with a brand new one and that has not changed the situation at all.
I do not believe it to be a software problem as I have tried re-installing the drivers and used system restore a few times.
Any help resolving the matter would be appreciated :)
Dan.

Hello Dan
I presume that there is problem with keyboard controller. I recommend you to contact service partner in your country. They can flash it and it should would work properly again.

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