You've already done a factory reset? Why?
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Hi and welcome to the forums!
A hard reset of the Blackberry is a battery pull. A factory reset is very involved.
So did you do a hard reset?
Was her device on a charger when it fell?
I had a Storm 9550 that started having the same symptoms you describe.
I finally found that I had cracked the battery without damage to the device.
I'd suggest pulling the battery and inspecting it closely for any cracking in the case. and make sure the contacts are clean. Inspect the inside of the device and make sure the battery is seated correctly. Check both the media card and the SIM make sure they are seated correctly as well.
See if you can reboot the device using the safe mode. Only core services will load so the device is a stable as possible. If you can get there you want to run the device self test.
The procedure are attached below, let us know how it goes.
Thanks,
Bifocals
KB17877 How to start a BlackBerry smartphone in Safe Mode
KB16037 Using the Self Test application on the BlackBerry smartphone
KB02141How to reset a BlackBerry smartphone
No data will be lost when doing the following: pull the battery while the device is ON.
Replace after a minute, Let the device reboot 1-3 min, see if the problem is fixed.
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thnx