Blackberry screen keeps flashing (white) on and off and red led light keeps blinking
Check whether this will fix the issue ,If not remove battery and sim when mobile is turned On and check.Still if you face same issue you need to re-install operating syatem to your blackberry
Your Blackberry probably just needs a firmware restore. Here's a guide on how to restore the blackberry firmware, the website is at : Restore Blackberryto factory settings.Download the Blackberry Desktop manager and run theapplication loader. Make sure you check to delete old applications inadvanced tab to delete whatever program keeps it from booting properly.
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