Currently Being ModeratedJan 14, 2013 1:01 PM (in response to Siv75)
First thing to try is to reset your device. Press and hold the Home and Sleep buttons simultaneously ignoring the red slider should one appear until the Apple logo appears. Let go of the buttons and let the device restart. See if that fixes your problem.
If you tried that its time to take the phone in to have it looked at be a service technician.
Currently Being ModeratedJan 14, 2013 1:59 PM (in response to Siv75)
Hold power and home until apple logo appears. While it is on the charger.
And make sure the outlet you are using works.
I know you might have tried this but a 2nd time is always good to try.