Using The Hdmi-In Port - ASROCK FM2A88X-ITX User Manual

2.8 Using the HDMI-In Port

The HDMI-In port on this motherboard lets you easily switch between PC
screen (on-board VGA) and external video source on the same monitor. This
function saves you the hassle of switching cables back and forth when you
want to display the screen of another device, such as smartphone, tablet,
camcorder, DVD player, or another PC, onto the PC monitor.
Another useful feature of this function is that external video source can be
viewed even when your PC is in standby mode or powered off. For example,
you can play smartphone games or watch tablet video on your PC screen.
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