Currently Being ModeratedDec 26, 2012 8:20 PM (in response to lenardii)
Make Genius reservation or Service arrangement and take or send to Apple for resolution with one year Warranty. Until you do so, you can use Virtural Power Button. Tap Settings App > General > Accessibiltiy > Assistive Touch > ON > tap the new small white screen button > Device > Lock. This can even be used to turn the iPhone OFF. To turn back ON, connect iPhone to power ie charger or USB of computer.