What to do with a sound on one side of a computer speaker

First, check whether the plug line is normal, no, look at the second step

Second, is the computer card properties of the default data may be artificially changed. Click the White "small horn" icon in the taskbar on the lower right corner of your computer desktop

On the volume Control Panel that pops up, click on the "Speaker" button and eject:

Click on "Level"

Click the "Balance" button

Restore balance by modifying the values of the left and right channels to be the same. "OK" all the way, the stereo will not side sound big side sound small.