If you have been using the Desktop Manager to load a new App, this smay be the cause.
If so , search for JL_cmdr and reload the OS. It may be as simple as that or it may be defective hardware.
Overview
The BlackBerry smartphone does not turn on, and the BlackBerry smartphone light-emitting diode (LED) flashes twice, pauses, and then repeats.
This behavior indicates that no applications are installed on the BlackBerry smartphone.
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Cause
The Application Loader tool in BlackBerry® Desktop Manager removed existing applications from the BlackBerry smartphone, but failed to install new applications.
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Z10 on BES
Z10 on BIS
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