My Thinkpad X41 Tablet has developed a digitizer fault

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Hello,

I have owned an X41 Tablet for some years now, and I have for the most part retired it to a fairly minor role now, as I use a newer (T400) regularly.

Recently I have noticed that the digitizer seems to have developed a fault, as only the X axis on it is working, and the Y axis is stuck at the bottom of the screen. If I move the pen around the screen, it only moves horizontally, but not vertically.

Does anyone know what this may be and how it can be fixed?

Thanks.