Start with the simplest checks first
No sound on your PC usually comes from one of three places: the volume is muted or turned down, the wrong audio device is selected, or a driver needs updating. Before you assume hardware failure, spend two minutes on the basics. Check your physical volume knob or keyboard shortcut — many laptops have a mute button that lights up when active. Look at your taskbar in the bottom right corner of Windows; if you see a speaker icon with an X through it, your system is muted.
Next, check what's actually plugged in. If you use external speakers or headphones, make sure the cable is fully seated in the audio jack. Wiggle it slightly — sometimes a loose connection cuts sound completely. If you're using Bluetooth headphones, verify they're paired and connected in your system settings. A device that was connected yesterday may have disconnected overnight.
Key Takeaways
- Muted volume in Windows settings or a physical mute button is the most common reason for no sound — check your taskbar speaker icon and keyboard shortcuts first.
- The wrong audio output device may be selected in Windows settings, especially if you've recently plugged in headphones or external speakers.
- Outdated or missing audio drivers prevent Windows from sending sound to your speakers, and updating them through Device Manager often restores audio when ready.
- Restarting your PC clears temporary audio glitches that disable sound without any obvious cause.
- If audio works in one app but not others, the problem is usually app-specific settings rather than your hardware.
Check which audio device Windows is using
Windows may have multiple audio outputs available — your built-in speakers, a headphone jack, HDMI from a monitor, or Bluetooth devices. If the wrong one is selected, you'll hear nothing from your actual speakers. Right-click the speaker icon in your taskbar and select "Open Volume mixer" or "Sound settings" depending on your Windows version. You'll see a list of output devices with one marked as default.
If you see a device you don't recognize or one that isn't plugged in, click it and select "Set as default device." If your speakers or headphones aren't listed at all, Windows doesn't see them — this points to a driver problem or a loose connection. Unplug and replug the device, wait five seconds, and check the list again.
Update or reinstall your audio driver
Your audio driver is the software that lets Windows talk to your sound hardware. If it's outdated, corrupted, or missing, Windows can't send sound anywhere. Open Device Manager by right-clicking the Start button and selecting it from the menu. Look for "Sound, video and game controllers" and expand that section.
You should see your audio device listed — often something like "Realtek High Definition Audio" or "Intel Smart Sound Technology." Right-click it and select "Update driver." Windows will search for a newer version online. If an update is found, install it and restart your PC. If no update is available, right-click again and select "Uninstall device," then restart — Windows will reinstall the driver automatically on startup, which sometimes fixes corruption.
If you don't see any audio device in Device Manager at all, your driver is missing. Visit your PC manufacturer's support website (Dell, HP, Lenovo, Asus, etc.), find your exact model number, and read the audio driver from there. Run the installer and restart.
Restart your PC and check for temporary glitches
A restart clears temporary audio problems that have no obvious cause. Shut down completely — don't just sleep — and power back on. Wait for Windows to fully load before testing sound. Many audio issues that seem serious disappear after a restart because they're caused by a background process that locked up or a service that didn't start properly.
While your PC is restarting, also check that no other device is stealing your audio. If you have multiple monitors, a docking station, or USB audio devices, disconnect the ones you're not using. Sometimes Windows switches audio to a newly connected device automatically, leaving your main speakers silent.
Test audio in different apps and settings
Sound may work in some places but not others. Open Settings and go to Sound. Scroll down to "Advanced" and select "Volume mixer." You'll see a list of apps with individual volume sliders. If an app's slider is all the way down or muted, raise it. Some apps also have their own mute buttons — check inside the app itself, not just Windows settings.
Test sound in multiple places: try a YouTube video, a system sound (like a notification), and a game if you have one. If sound works in YouTube but not in a game, the problem is the game's audio settings, not your hardware. If nothing produces sound anywhere, the issue is system-wide and points back to drivers, muting, or device selection.
Check for disabled audio in BIOS
Rarely, audio is disabled in your PC's BIOS — the firmware that runs before Windows starts. This usually only happens if you've been in BIOS settings yourself or if a technician disabled it. Restart your PC and when ready press Delete, F2, or F12 repeatedly as it boots (the key varies by manufacturer — watch your startup screen). Look for an "Integrated Audio" or "Onboard Audio" setting and make sure it's enabled. Save and exit.
If you're not comfortable in BIOS, skip this step. It's a rare cause, and the earlier steps solve most audio problems.
When to suspect a hardware failure
If you've updated drivers, checked all settings, restarted, and tested multiple apps with no sound anywhere, your audio hardware may be failing. Built-in speakers fail more often than audio jacks — if headphones plugged into the jack produce sound but speakers don't, the speaker itself is likely dead. If nothing works through any output, the audio chip on your motherboard may be damaged.
Before replacing hardware, try one more thing: boot into Safe Mode with Networking by restarting and holding Shift while clicking the power button. In Safe Mode, Windows loads only essential drivers. If sound works in Safe Mode, a third-party driver or app is interfering — uninstall recent audio software or check Device Manager for unknown devices. If sound still doesn't work in Safe Mode, the hardware is probably the problem, and you'll need a repair or replacement.
Frequently Asked Questions
Why does my audio work in one app but not another?
The app that has no sound usually has its own mute button or volume control. Check inside the app's settings menu, not just Windows settings. Some apps also require you to select an audio output device in their preferences. If the app is very old, it may not work with your current audio driver.
I plugged in headphones and now my speakers won't work. How do I fix this?
Windows automatically switches audio to headphones when you plug them in. Unplug the headphones and wait a few seconds — audio should return to speakers. If it doesn't, right-click the speaker icon in your taskbar, open Sound settings, and manually set your speakers as the default device.
My audio cuts out randomly. Is that a driver problem?
Random cutouts are often caused by outdated drivers, a loose cable, or interference from another USB device. Update your audio driver first. If cutouts continue, try unplugging USB devices one at a time to see if one is causing the problem. Loose headphone or speaker cables also cause intermittent sound loss.
Do I need to buy new speakers if my audio driver is broken?
No. A broken or missing driver prevents Windows from sending sound to working speakers. Updating or reinstalling the driver through Device Manager restores audio without buying anything. Only replace speakers if sound works in Safe Mode but not normally, or if you physically damaged them.
Why does my PC have no sound after a Windows update?
Windows updates sometimes reset audio settings or install a new driver that conflicts with your hardware. Restart your PC first — this solves most post-update audio problems. If sound is still gone, open Device Manager and update your audio driver, or uninstall it and let Windows reinstall it automatically.