Stuck in standby, help?

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http://forum.xda-developers.com – Just wondering if this is a common issue-- it's happened maybe three times total. I hit the button to put the phone in standby-- and then when I hit it again nothing, screen's just black. If I have a new notification, the blue light will still flash so I know it has power. The only thing I could do each time was take out the battery and put it back in. Should I go get a new phone, or is this a known issue? Thanks! (HowTos)