Asus K20DA User Manual page 22

Using the onboard display output ports
Connect your monitor to the onboard display output port.
To connect an external monitor using the onboard display output ports:
1. Connect a VGA monitor to the VGA port, or a DVI-D monitor to the DVI-D port, or an HDMI
monitor to the HDMI port on the rear panel of your computer.
2. Plug the monitor to a power source.
K20DA / A20DA / F20DA
K31DA / A31DA / F31DA / K31DAG / A31DAG / F31DAG
22 Chapter 1: Getting started