The sound card or motherboard driver is too old.
Solution:
Just upgrade the corresponding driver to the latest version.
Speakers are disabled.
Solution:
The small speaker icon in the lower right corner of the computer, right-click and select "Play Device".
Looking inside, there are two devices: speakers and headphones.
Confirm that the speaker is set to disabled, and if so, enable it.
If sound is output through speakers or headphones
Just check whether the audio peripheral is damaged or whether the speaker power is turned on normally.