Start with the simplest checks first

Most of the time when your PC produces no sound, the problem is not broken hardware—it is a setting you can fix in seconds. Before you assume your speakers or sound card failed, check three things: whether your speakers are plugged in and turned on, whether the volume slider in Windows is muted or turned all the way down, and whether the program you are using (your browser, a video player, a game) has its own mute button or volume control that is turned off.

Open the volume mixer by clicking the speaker icon in the bottom right corner of your taskbar. If you see a mute symbol (a speaker with a line through it), click it to unmute. If the slider is at zero, drag it to the right. These two steps solve the problem in roughly half of all "no sound" reports.

If you have external speakers, make sure the cable from your PC to the speakers is plugged firmly into the audio jack (usually a green port on the back of your tower, or a headphone jack on a laptop). Wiggle the cable gently—sometimes a loose connection looks fine but does not carry sound. If you use a USB speaker or headset, check that it is plugged into a working USB port.

Key Takeaways

  • Check that your speakers are powered on and plugged in, and that the Windows volume slider is not muted or at zero.
  • Make sure the audio cable is firmly seated in the correct jack, and test a different USB port if you use a USB speaker or headset.
  • Open Device Manager and look for a yellow exclamation mark next to your audio device, which means the driver needs updating or reinstalling.
  • If Device Manager shows no audio device at all, your sound card may have failed and you will need to replace it or use an external USB audio device.
  • Restarting Windows solves many sound problems because it resets the audio service and clears temporary software conflicts.

Check whether Windows recognizes your audio device

If your speakers are on and the volume is up, the next step is to confirm that Windows can see your sound card or audio device. Right-click the Start button and select Device Manager. Look for a section called "Sound, video and game controllers" and expand it by clicking the arrow next to it.

You should see at least one audio device listed—usually something like "Realtek High Definition Audio" or "Intel Smart Sound Technology". If you see a yellow exclamation mark next to it, Windows recognizes the device but the driver (the software that lets Windows talk to the hardware) is broken or out of date. If you see no audio device at all, your sound card may have failed, or it may have been disabled in BIOS (the firmware that runs before Windows starts).

If there is a yellow exclamation mark, right-click the audio device and select "Update driver". Windows will search for a newer version online. If that does not work, right-click it again and select "Uninstall device", then restart your PC. Windows will reinstall the driver automatically when it boots back up.

Restart Windows and check the audio service

Restarting your PC fixes sound problems more often than you might expect, because it resets the audio service (the part of Windows that manages sound) and clears any temporary conflicts between programs. Before you restart, save your work and close everything you are using.

After your PC restarts, test your sound again. If it works, you are done. If it still does not work, you need to check whether the audio service is running. Press the Windows key and type "services" and open the Services app. Scroll down to find "Windows Audio" in the list.

Click on "Windows Audio" to select it. On the left side, you should see a button that says "Start the service". If that button is there and clickable, click it. If the button says "Stop the service" instead, the service is already running and that is not the problem. Close the Services window and move to the next section.

Test your audio with a different program and different content

Sometimes the problem is not your hardware or Windows—it is the program you are using. A web browser might have muted a specific website, a video player might have its own volume control turned down, or a game might route sound through a setting you have not found yet.

Open a different program and test sound there. If you normally watch videos in Chrome, try opening a video in Microsoft Edge or Firefox. If you play a game, try playing a YouTube video or opening Windows Settings and playing a test sound. If sound works in one program but not another, the problem is in the program that has no sound, not in your PC.

To test a system sound, right-click the speaker icon in the taskbar and select "Open Sound settings". Scroll down to "Advanced" and click "Volume mixer". You should see a list of programs and their individual volume levels. Make sure none of them are muted and all are turned up.

Check BIOS if your sound card is not showing up in Device Manager

If Device Manager shows no audio device at all, your sound card may be disabled in BIOS—the firmware layer that runs before Windows starts. To enter BIOS, restart your PC and watch the screen carefully as it boots. You will see a message that says something like "Press Delete to enter Setup" or "Press F2 to enter BIOS". The key varies by manufacturer (Dell, HP, Lenovo, Asus, and others all use different keys).

Press that key repeatedly until the BIOS menu appears. Look for a section called "Integrated Peripherals", "Onboard Devices", or "Advanced". Inside, find an option for "Audio" or "High Definition Audio" and make sure it is set to "Enabled" rather than "Disabled". Save your changes (usually by pressing F10) and let your PC restart.

If you are not comfortable entering BIOS, or if you cannot find the audio setting, you can look up your specific PC model online—search for "[your PC model] enable audio BIOS"—or contact the manufacturer's support line. Changing the wrong setting in BIOS can cause other problems, so it is better to ask than to guess.

Replace or bypass a failed sound card

If Device Manager shows your audio device with a yellow exclamation mark, you have tried updating the driver, and sound still does not work, your sound card may have failed. If you have a desktop PC, you can buy a replacement sound card (they cost between $30 and $150 depending on quality) and install it in an empty slot inside your tower. This is a straightforward hardware swap if you are comfortable opening your PC.

If you have a laptop, or if you do not want to open your desktop, an external USB audio device is simpler. A USB sound card or USB headset with a built-in audio processor costs $20 to $80 and plugs into any USB port. Windows will recognize it automatically, and you can set it as your default audio device in Sound settings.

To set a USB device as default, right-click the speaker icon in the taskbar, select "Open Sound settings", scroll down to "Advanced", and click "Volume mixer". At the top, under "Output", click the dropdown menu and select your USB device. Any sound your PC produces will now go through the USB device instead of the built-in card.

Frequently Asked Questions

Why does sound work in some programs but not others?

Each program can have its own volume control and mute button, separate from Windows volume. Check the program's settings menu and look for an audio or sound option. Also check the Windows volume mixer to see if that specific program is muted or turned down.

I see my audio device in Device Manager but it has a yellow exclamation mark. What does that mean?

A yellow exclamation mark means Windows found the device but cannot communicate with it properly, usually because the driver is missing, broken, or out of date. Right-click the device and select "Update driver" to read a newer version from the manufacturer.

My headphones work but my speakers do not. What should I check?

Windows may have set your headphones as the default audio device. Right-click the speaker icon in the taskbar, select "Open Sound settings", scroll to "Advanced", and under "Output" make sure your speakers are selected as the default device, not your headphones.

Do I need to buy a new sound card if mine failed?

Not necessarily. A USB audio device (a small adapter that plugs into USB) costs less than a sound card and works just as well for everyday use. If you have a desktop PC and want to keep using your existing speakers, a USB sound card is the easiest fix.

What if I restart Windows and sound still does not work?

Work through the steps in order: check Device Manager for a yellow exclamation mark, verify the Windows Audio service is running, test sound in a different program, and check BIOS if your audio device is missing entirely. Each step narrows down where the problem is.