Charging
1) There are two ways to charge the battery
> through the USB to PC (sometimes the PC's do not give a full charge.)
> By the AC charger (the RIM brand charger gives the required voltage).
Try both methods
You might have a bad battery that needs replacement.
2) If the battery is fully charged, using your PC reload the OS following these steps:
http://crackberry.com/blackberry-101...ked-blackberry
3) If (1) and (2) do not solve the problem, take the battery out of the phone for a
full 24 hours. When you return the battery to the phone, the phone will re-set.