[Q] Samsung Galaxy s iii power button does nothing

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http://forum.xda-developers.com – Help! I have been unable to find any posts on this topic here or elsewhere. I have a rooted Samsung Galaxy S3 AT&T running CyanogenMod 10.1 rc 2. This release has been running well. In the course of trying to update, when I rebooted into recovery (I have used both TWRP 2.5 and ClockworkMod 6) the phone powered down and would not reboot. Pressing and holding the power button (with or without volume up/down or home) for an extended period of time did absolutely nothing. Nor did pulling the battery, which had 80%+ charge. All threads I have seen describe situations where powering-o (HowTos)