What to do if there is no sound on the minidp?

The solution is as follows:
1. Right-click on the volume icon at the bottom right corner of the desktop and select "Playback Device".
2. Then, set the audio of the graphics card as the default device.
After connecting the host and the monitor with a DP cable, if the host speakers have no sound, it is because the audio has been sent to the monitor.
Just like HDMI, the DP interface also allows audio and video signals to be transmitted through the same cable, supporting various high-quality digital audio.
After connecting the host and the monitor with a DP cable, if the default audio device is the monitor audio, the sound signal will be sent to the monitor, and the host speakers will have no sound output.
To output the sound from the host speakers, you can enter the control panel, go to the audio management, and set the local speakers as the default audio device.