LG T280 User Manual page 72

5-2. Connecting Monitor
Monitor Toggle Features (Converting the Screen Using the Shortcut Key)
※ If you have an external monitor connected to the computer, press the Fn + F7 keys to rotate the display mode
between LCD only, Monitor only, and LCD + Monitor both in order.
■ Ensure the monitor power is off before connect external monitor to the notebook pc.
Connecting Peripherals 73