High-Definition Multimedia Interface, colloquially known as HDMI is a video and audio interface for streaming digital media through an HDMI equipped source. Let’s begin by understanding what the HDMI cable is. In this article, we will show you how to troubleshoot this projection problem. Second screen only: All the contents are displayed on the external display instead of the computer.It is a very common occurrence that you want to use your projector to stream some movies at home, or you need it to run an important presentation back in the office, there pops out a message which shows “no signal, screensaver, etc.” when connecting your streaming device to the projector by an HDMI cable.The displays are separate from each other in this mode. To display content (like an app) from the computer, drag it to the other screen. Extend: The display on your computer will appear as normal, but the external display will only show the basic system setup.Duplicate: The content is displayed on both the computer screen and the connected external display.(If a wireless projector is connected, this option will be displayed as Disconnect.) PC screen only: The content is displayed on the computer screen instead of the external display. You can also change the projection mode on the PROJECT screen.
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