However, if needed, I can also guide you through that process.
But do not release the power button.
Wait until the unit has completely restarted and turned on again.
After that, the glitches should disappear.
Depending on the model, these buttons are usually located on the back or bottom of the TV.
Its usually located on the TVs bottom, side, or back.
Some models have a single button as a joystick to navigate on-screen menus.
Typically, the prefs are saved after a restart.