The Win7 sound card driver works fine without a sound on the computer.
The steps are as follows:
1. In this case, the sound can only be retrieved in a few simple steps.
Open: Start--Control Panel---Realtek High Definition Audio Manager
2. Locate the yellow folder in the upper right corner and click the left mouse button to open it.
3. Tick [Disable front panel jack detection] and click OK. You will find that the disappearing sound is back.
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