HDMI does not require a separate audio cable. If the audio is not working you may have to restart your computer or device.
If you have trouble seeing your main laptop screen on the projector after connecting,
On a Windows 7 PC, Press the “Windows” key and “P” key then choose “Duplicate” or go to the START Menu >Control Panel > Displays > Connect to Projector and select “Duplicate”
On a Windows 10 PC, Press the “Windows” key and “P” key then choose “Duplicate” or go to the START Menu >Settings (gear icon) > Displays > Connect to Projector and select “Duplicate”
On Mac go Press the “Command” and “F1” to toggle from mirror and extended screens or go to the Apple Menu >System Preferences > Displays > Arrangement and select “Mirror”
