App centre and power button question?

[WPCentral Question]

i have the windows 8.1 preview for developers update .. long back after the update the power button wasnt working . thot it would be solved after the final release .. i got and update today .. unfortunately power button still not working .. i was trying other features and found app centre in settings .. i launched it .. now to revert back i need to use the power button .... what do i do to get back

 

[David P2]

If it's physically damaged then no amount of software updates can fix it.