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Touchscreen not functioning is this a hardware or software issue?

I purchased a Microsoft surface 2 used and touchscreen is non functional. I have looked all over and really can’t find a good response for this. The device is up to date and I have reloaded the OS/ drained the battery/ adjusted the device manager etc. Before I buy a new screen and digitizer has anyone ever really found a fix for this? Microsoft was no help.

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