For MacOS, Top left corner Apple icon–>System Preferences–>Displays–>Mirror or Extend Displays;

For Windows 10, press Windows key + P combination command–>choose Duplicate or Extend.

For Windows system laptop, if the external monitor could not work, please update the BIOS and graphic card driver from laptop official website.

1. In order to enjoy the 4K high resolution, please make sure to use HDMI 2.0 cable.

2. Supports resolution up to 4k@30Hz,but we recommend you to make sure your monitor/tv could supply corresponding output. That means if your computer supports 4K@30Hz, while your monitor/TV only supports1080p, you can only output 1080p rather than 4K.

3. If the resolution of your laptop is higher than the external monitor.

For windows: Windows Menu–> Setting–> Display–> Advanced Display Settings, set your laptop’s resolution same as or lower the resolution of external monitor.

For MacOS: Left-upper Apple icon–>System Preferences–>Displays–>Mirror displays. Then your HDMI monitor would mirror your Mac. However here you have two choices. One is “Optimize For” your built-in Retina Display, the other is “Optimize For” your HDMI monitor. You can choose which one you like.

For Lenovo Yoga 910, please always use the white USB-C port.

For MacOS, Please go to Apple icon–>System Preferences–>Sound–>Output, choose your TV as the sound output.

For Windows 10, please click right bottom of your sound icon–>choose your TV as the sound output.

For Sony TV, if you are running MacOS, you probably need to go to Launchpad–>Other–>Audio MIDI Setup–>DisplayPort–>Output–>Please choose 2 ch 16-bit integer.