Are you using Microsoft Windows eXPerience operating system and sound does not work on your computer system? Prior to turning your computer system on, it was still working. What have you done to cause this problem and how can you correct it you ask?
You checked to see if you disconnected any wiring and used a sound button to raise and lower sound on your computer monitor. You can view and go through some steps in this No sound in Windows Microsoft support article. Also, you can perform a Microsoft Windows eXPerience operating system restore, if those troubleshooting steps from Microsoft support do not resolve your issue.
Basically, you will want to pick a Microsoft Windows eXPerience restore point before your sound problem started occurring.
1. Log on to Microsoft Windows eXPerience operating system with your "Administrator" account credentials.
2. Click the "Start" menu icon, then choose "All Programs", now select "Accessories", then choose "System Tools", and now click on "System Restore". Microsoft Windows eXPerience operating system restore starts.
3. On a "Welcome to System Restore" page, you will want to click on "Restore my computer to an earlier time, if it is not already selected, and then click on "Next".
4. On the "Select a Restore Point" page, you can click the most recent system restore point on this list, then choose that restore point from a list, and then click "Next".
5. On a "Confirm Restore Point Selection page, you will want to click "Next". Microsoft Windows system restore will restore the computer operating system to that previous Microsoft Windows eXPerience configuration, and then restarts your computer for you.
6. You will want to gog on to that computer with "Administrator" privileged credentials. A "System Restore Restoration Complete" page is displayed on your screen.
7. You can then finally click "OK".
Hopefully, this will fix your sound problem you are receiving on your Microsoft Windows eXPerience operating system based computer. These instructions were written for a computer running Microsoft Windows eXPerience operating system. However, you can certainly use them as general troubleshooting steps and tips for other Microsoft Windows operating systems.