Why won't my Note II boot past the Samsung screen?

A

AC Question

Note II won't boot past Samsung

My Samsung Note 2 was working fine up until yesterday. I received a software update notification on my home screen from AT&T yesterday morning. I clicked to proceed with the update. After the phone shut off, it never came back on. I have not been able to turn the phone on with the power button. The battery is fully charged. The phone is rooted. I believe I have the latest version of the OS. When I take the battery out, and put it back in, the screen will briefly read "Samsung Galaxy Note II", then the screen will go black and won't boot up.

When I take the battery out, then put it back in, then hold power + up + home, I get the AT&T logo, then it says updating & installing, and shows the progress bar. Once the update and install is complete, the "Samsung Galaxy Note II" appears on screen, then nothing happens.

When I take the battery out, then put it back in, then hold power + down + home, I get the Android logo and the phone does into download mode.
 

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