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2016-08-02 03:58 AM
2016-08-02 04:20 AM
Welcome to the community.
This sounds like a hardware fault, I think is may be coincedental that the issue occurred during the update.
2016-08-02 04:33 AM
It is not possible to uninstall the update, but the software repair will re-install the whole Android OS with a fresh copy, including the update. If it is a software problem, the software repair will fix it.