Originally Posted by MaeMae
Please help! I'm experiencing the same problem. I was trying to to use the twitter, then my unit froze. I waited for few minutes and it still won't load so I tried rebooting it by removing the battery. (Battery is full charged btw). Then I tried turning it on, but it won't. There's a red light and the blackberry loading is showing up on screen then after 4-5 seconds the unit will die then load again.
Sounds like you have a bad or corrupted app. If you are using OS 4.6 or newer, you can try booting in safe mode so that you can at least do a backup. You could also try removing suspicious third-party apps and see if it will reboot, but if it were me I would just go ahead and wipe it after you back it up, then reinstall the OS and restore your data.
See KB17877-How to start a BlackBerry smartphone in safe mode
for instructions on booting up in safe mode.