Check the physical mute button and volume controls first

Before troubleshooting software, look for a physical mute switch on your keyboard or monitor. Many keyboards have a dedicated mute key (often marked with a speaker icon with a line through it) or a volume control button. Press it once to unmute. On laptops, this key is usually in the top row and may require you to hold the Fn key at the same time.

Next, check your system volume level. On Windows, click the speaker icon in the bottom right corner of your taskbar. A volume slider will appear — make sure it is not set to zero and that the mute button (the speaker icon itself) is not activated. On Mac, click the speaker icon in the top right corner of the menu bar and adjust the slider upward. If you see a small red circle with a line through the speaker, your system is muted; click it to unmute.

Key Takeaways

  • Check your keyboard for a physical mute key or volume buttons before assuming a software problem exists.
  • Windows and Mac both show volume controls in the system tray or menu bar, and a muted speaker icon means sound is turned off at the system level.
  • Individual applications can mute themselves independently, so check the volume controls within the program you are trying to use.
  • Restarting your computer fixes most sound problems because it resets audio drivers and clears temporary glitches.
  • If restarting does not work, check Device Manager on Windows or System Report on Mac to see if your audio hardware is recognized.

Look for mute controls inside the process you are using

Many programs have their own volume controls separate from your system volume. If your system volume is turned up but you hear nothing from a specific app — a web browser, video player, or game — look for a speaker icon or volume slider within that program's window. Muting the process will not affect other programs.

In web browsers like Chrome, Firefox, or Edge, right-click on a tab that is playing sound and select "Mute site" or "Unmute site." You can also look for a small speaker icon next to the tab name; a line through it means that tab is muted. Some websites also have their own volume controls embedded in the video or audio player — check for a speaker icon within the player itself.

Restart your computer to reset audio drivers

A restart fixes the majority of sound problems because it resets your audio drivers and clears temporary software glitches. Save your work, then shut down your computer completely. Wait 10 to 15 seconds, then turn it back on. Once it finishes starting up, test your sound by playing a video or opening a music app.

If you are on Windows and want a faster reset without a full restart, you can restart just the audio service. Press the Windows key and R together, type services.msc, and press Enter. Scroll down to find "Windows Audio," right-click it, and select "Restart." This takes about 30 seconds and often restores sound without restarting your whole computer.

Update or reinstall your audio drivers on Windows

Audio drivers are the software that lets your operating system communicate with your sound hardware. Outdated or corrupted drivers are a common reason sound stops working. On Windows, right-click the Start button and select "Device Manager." Look for "Sound, video and game controllers" and click the arrow next to it to expand the list.

Right-click your audio device (usually called "Realtek Audio," "High Definition Audio," or something similar) and select "Update driver." Choose "Search automatically for updated driver software" and let Windows search for the latest version. If an update is found, install it and restart your computer. If updating does not work, right-click the device again, select "Uninstall device," restart your computer, and Windows will reinstall the driver automatically.

Check that your speakers or headphones are properly connected

If you are using external speakers or headphones, make sure the cable is fully plugged into the correct port. On most computers, the audio output port is colored green or marked with a speaker icon. Wiggle the cable gently while sound is playing to see if the connection is loose — you may hear crackling or a brief sound if the connection is intermittent.

For wireless headphones or speakers, check that they are turned on, charged, and paired with your computer. On Windows, go to Settings > Bluetooth & devices > Bluetooth and look for your device in the list. If it shows as "Paired" but not "Connected," click it and select "Connect." On Mac, go to System Settings > Bluetooth and do the same. If your device does not appear, turn it off and on again, then search for it in the Bluetooth menu.

Run the Windows audio troubleshooter if you are on Windows

Windows includes a built-in troubleshooter that can detect and fix common sound problems automatically. Right-click the speaker icon in your taskbar and select "Troubleshoot sound problems." Windows will run a diagnostic and may ask you which device you are trying to use (speakers, headphones, or HDMI). Follow the prompts and let it attempt repairs.

If the troubleshooter does not find a problem but you still have no sound, try running it again and selecting a different output device. Sometimes Windows defaults to the wrong speaker or output port, and the troubleshooter can switch it for you. After it finishes, restart your computer and test your sound again.

Check your HDMI or display cable if you are using a monitor with built-in speakers

If your monitor has built-in speakers and you are getting no sound, the problem may be that Windows is not sending audio through HDMI. Right-click the speaker icon in your taskbar and select "Open Volume mixer" or "Volume settings." Look at the list of output devices and make sure your monitor or HDMI device is selected, not "Speakers" or another output.

If your monitor does not appear in the list, the HDMI cable may not be fully seated. Turn off your monitor and computer, unplug the HDMI cable from both ends, wait 10 seconds, and plug it back in firmly. Turn everything back on and check if your monitor now appears as an audio output option. If it does, select it and test your sound.

Frequently Asked Questions

Why did my sound suddenly stop working?

Sound usually stops suddenly because of a muted process, a disconnected cable, or a driver that crashed. Check your system volume and process volume first, then restart your computer. If that does not work, check your cable connections and run the Windows troubleshooter or update your audio drivers.

How do I know if my speakers are broken or if it is a software problem?

Try a different audio output. If you normally use speakers, plug in headphones. If headphones work but speakers do not, your speakers may be broken or disconnected. If neither works, the problem is almost certainly software. Restart your computer and update your audio drivers.

Can a Windows update cause sound to stop working?

Yes. Windows updates sometimes reset audio settings or cause driver conflicts. If your sound stopped after an update, restart your computer first. If that does not work, go to Device Manager, find your audio device, and update the driver. You can also roll back the driver to the previous version if updating does not help.

What if I have no sound in one app but sound works everywhere else?

The app itself is muted or has a separate volume control. Look for a speaker icon or volume slider inside the app window. In web browsers, right-click the tab and select "Unmute site." If the app has its own settings menu, check there for audio or volume options.

Do I need to uninstall and reinstall my audio driver or just update it?

Try updating first — it is faster and usually works. If updating does not restore sound, then uninstall the driver, restart your computer, and let Windows reinstall it automatically. Uninstalling forces Windows to read a fresh copy from its driver database.