Hisense HK570 User Manual page 16

02. Dual Monitor Usage
Additional monitor can be connected to the VGA connector. This content is written
based on Windows 7.
The system supports dual monitor system, which is using two monitors for one
system. Sub-monitor's screen can be displayed as a duplication of the main monitor
or as an extended screen. (Windows desktop)
1. Connect the external monitor when the system is off. (Remove the 'Interface
cover' at the top of the system and you will see a VGA connector.)
1) Connect the external monitor when the system is off.
2) Connect a power cable to external monitor
2. Press a power button of the system
3. Click the right button of mouse on Windows desktop screen and select 'Screen
resolution' from a popup menu.