| The earphones do not output sound after the monitor and earphones are connected to a host |
Problem
The monitor and a pair of earphones are connected to a host (a desktop or laptop), but the earphones do not output sound.
Cause
When the monitor is connected to a host, Microphone (MateView) and Mateview (HD Audio Driver for Display Audio) will be displayed under Input and Output on the Sound settings screen respectively. If there are earphones connected to the host, you need to select the host's audio output device for audio output. Otherwise, there will be no sound from the earphones.
Solution
After the monitor is connected to a host (a laptop or desktop), right-click the 
icon in the lower right corner of the Windows 10 desktop, select Open Sound settings to enter the Sound settings screen, and select the audio output device on the host under Choose your output device.