TOPIC: Galaxy Tab A SMT350 stuck after root attempt

Hi,
my Tab A 8.0 SMT350 is stuck at "Recovery is not Seandroid Enforcing" after following your instructions. I can re-flash stock firmware like you suggested in a few other threads but I can't get the tablet to turn off or reboot. Any idea how to get it to reboot? Thanks.

This happens after a security update even though the firmware version is same.
To switch off please hold on to the power button until it is fully powered off. If it's in a bootloop please follow this tutorial. http://www.samsungsfour.com/tutorials/how-to-resolve-android-boot-loop.html
Kindly update me the status.