Receiving Message: KERNEL IS NOT SEANDROID ENFORCING
My Samsung Tab A SM-T580is dead. Hasn't been used for months because it was packed away. I looked at messages on how to solve the problem. I held down the power button at the same time as the volume up bottom for 30 seconds, released the power button and plugged in the USB cable. After 30 seconds, I released the volume up button. I then received the above message with a blinking charge button. Don’t know what to do next.