Nokia Lumia 920 Unable to find a bootable option?

I turned my phone off for a lecture, attempted to turn it back on and it just kept saying "nokia" on the screen various times before displaying the error message "ERROR: Unable to find a bootable option. Press any key to shut down".
I've tried a soft and hard reset but it just doesn't work. Since it wont turn on, it cant connect to my laptop or anything. Help?

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