When you turn it off by the TV mode what does it do? give you an error code or what?
Please try Safe Mode to see if the symptom persists.
Press and hold the Power button until the 'Power off' prompt appears on the screen then release.
Touch and hold Power off until the 'Safe mode' prompt appears then release.
Tap Safe mode to confirm.
Note The process may take up to 45 seconds to complete.
Note Upon reboot, 'Safe mode' appears in the lower-left of the unlock / Home screen.