Calibrate Your Display
If part of your display is missing or cut off at the edges of your screen, your TV may be automatically
scaling your picture.
You can use the Calibrate Display option (Settings > Display & Sounds > Display > Calibrate Display)
to adjust for this. You'll see a screen with grey arrows pointing to the edges of your TV, which you can use
as a guide when making your adjustments.
Use the Up and Down arrows on your Fire TV remote to adjust your display so that the grey arrows are
completely visible and touching the edges of your screen.
Restart Your Device
If the steps above don't work, try restarting your device. Disconnect the power cord (from the back of the
device or from the power outlet) and then plug it back in.
You can also use your remote to restart your device. Press and hold the Select and Play/Pause
buttons at the same time, for about five seconds. Or, open Settings > System > Restart from the Fire TV
menu.