The FAQ is your best friend. Always look there for a solution.
Battery pull
With the device ON, remove the back cover and take out the battery. Leave it out for 30 to 60 seconds then put it back in and let the device reboot.
1st step to take if device is having problems? - BlackBerryFAQ
Resend service books:
How do I resend my service books? - BlackBerryFAQ