Problem:
After plugging in the headphones, the computer cannot automatically switch to the headphone output.
Cause：
The speaker is set as the default by mistake, so the default playback device is the speaker after plugging in the headphones.
Solution:
After inserting the headphones, click the small speaker in the lower right corner, select the sounds - choose Playback, select the headphones, click the "Set default" button in the lower right corner, and click OK.
