I have a Acer Iconia B1 a71 and the display touch does not respond anylonger ,it suddenly stopped working.
It is still on stock firmware and is unrooted are there any methods on repairing my tablet?
Very often problem with this model. In 60% it can be resolved only with reconnecting the Touchscreen flex / ribbon cable.
If this solution not helped you then you must to change your Touchscreen.
Video manual: http://youtu.be/_WkFaGAdS9g
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