I'm assuming that you are a windows user. If i'm right you can try the following command to restore the firmware. Plug your BlackBerry into your pc. Press the "Windows button" and "R" at the same time. This will bring up the "run" dialog box. Type cmd into the text area and hit enter.
Then once at the command prompt try this code.
C:\Program Files\Common Files\Research In Motion\AppLoader\Loader.exe /nojvm
If that works you should be able to reload the firmware and perhaps that will solve your boot issues.
If not then try this method; http://crackberry.com/blackberry-101...CrackBerry.com