iPhone 5 stuck after reset all settings

Hi !

I've got my iPhone 5 7.0.4 Jailbroken stucks on Apple Logo + empty progress bar.
After an "Erase all settings".

I have do a Hard Reset but, still booting with "Erase all settings" mode. :(

Can anybody help ?
Thanks

Update #1 :

After 3 Hard Reset, progress bar has increase, still frozen at 50%
So Rebooted/Hard Reset and still empty frozen bar.