Blackberry has blank screen(looks like its turned off) but rings when someone calls....unable to pick up call
If the LCD screen is white, blank or empty, a soft reset may need to be performed, or there may be an error with the display drivers and the OS will need to be re-loaded onto the device. Please follow these steps:
If BlackBerry Destop Manger is installed, skip to step 2. If not,
Note: Running the Application Loader will take approximately 15-60 minutes to complete.
this link will actually show you a video on how and also all the steps with screen shots!!
http://forums.t-mobile.com/t5/BlackBerry-General-All-Devices/HOW-TO-Install-New-Software-and-Update-Application-Loader/ta-p/306005
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