Hey, give these steps a try.
Warning: The procedure listed below will delete all user data. If you do not want to lose your data stop now and perform a data backup.
If the device is stuck in a boot loop, a hard reset will need to be performed. follow the steps below:
Power the Tab off.
Press and hold Volume Up and Power buttons.
When the Samsung Galaxy Tab logo appears, let go of the Power button and continue holding the Volume Down button (Two Android icons appear).
When the two Android icons appear release the Volume Down button, then press the Volume Down button to move the cursor to the left; and then press the Volume Up button to make your selection (The Android system recovery menu appears).
Press the Volume Up or Down button to select "wipe data/factory reset", and then press the Power button to make your selection.
Press the Volume Up or Down button to select "Yes – delete all user data", and then press the Power button to make your selection.
When the reset is complete, press the Volume Up or Down button to select "reboot system now", and then press the Power button to make your selection.
If these steps do not work, the device will require service.