You may have flashed wrong model tabletui patch in your tab.
If you can get into download mode then do this:
*Go to download mode (Power + Volume down)
*Install Odin (I recommend use v1.85)
*Download a Official Firmware zip for your tab.
*Connect your tab to Pc, then open Odin, and then Flash official zip using Odin.
You are done. Now you will be running Official Firmware from Samsung.
(Please Read instructions carefully while flashing, Good Luck) :thumbup:
Sent from my GT-P3100 using XDA Premium 4 mobile app