Press 
(Input Select button) to display HDMI signals after you connect
HDMI cable with the monitor.
7.
Power Button/Power Indicator:
•Press this button to turn the monitor on/off.
•The color definition of the power indicator is as the table below.
Status | Description |
White | ON |
Amber | Standby mode |
OFF | OFF |
ASUS LCD Monitor MX279 |