When a computer has no sound, the cause is usually audio going to the wrong output, such as an HDMI monitor, dock, headset, or Bluetooth device, a muted control, or one app's own audio state; cables, drivers, and hardware faults are less common. Turn the volume down before switching devices, then test a known local sound through the built-in speakers. This separates a simple routing mistake from an app, cable, Bluetooth, driver, or hardware problem.

Stop immediately if a connector is damaged, liquid entered the computer, or you notice sparking or a burning smell. Do not keep reconnecting suspect powered speakers, docks, or adapters.

Key Takeaways

Test one known local sound so a network or streaming failure does not look like an audio failure.

Compare one app with the whole system, then built-in speakers with one external output.

Lower the volume before changing outputs because the next device may be much louder.

Check the physical path and selected output before reinstalling software.

Avoid generic driver-updater utilities and destructive audio-stack resets.

For a broader branching method, start with the device and app troubleshooting guide. If the problem is recording rather than playback, use the dedicated microphone signal-path guide.

Computer has no sound in one app or everywhere?

Use a short, non-sensitive audio file stored on the computer. Play it in the operating system's normal media app, then compare it with a system alert. A browser tab, game, meeting app, or streaming service can fail independently because it has its own mute, output, session, codec, or service state.

If the local file and system alert work, leave the system audio configuration alone. Check the affected app's volume, in-app output selection, muted tab or participant state, and whether the app needs to be reopened after an output change. A meeting app may continue using the headset selected when the call began even after the operating system changes its default.

If every app is silent, continue at the system layer. If only online media is silent, compare another local file and another site before treating it as a computer-wide audio fault. Do not raise every control to maximum; that creates a hearing risk when the correct path returns.

Observation	Most useful next check
One app is silent	Its mute, mixer level, session output, and restart state
Browser media is silent	Tab/site mute, player level, and a local-file comparison
Built-in speakers work	External device, cable, port, power, or routing
Headphones work but speakers do not	Speaker output selection or internal hardware
No output works	System routing, audio service, supported update, or hardware

Is the sound going to the wrong audio output device?

Disconnect unnecessary audio accessories temporarily. HDMI monitors, USB docks, headsets, Bluetooth speakers, virtual audio devices, and remote-desktop sessions can all become the selected output. The device name may not describe the physical speaker clearly, so change one output at a time and test after each change.

Windows output checks

Select the speaker icon, open the output list, and choose the intended device. Check the main volume and the Volume mixer because Windows can store a separate level or output for each app. Microsoft's checklist covers the selected output, mute state, default playback device, audio enhancements, and the Get Help audio troubleshooter before driver work.［1］

If an HDMI display is selected but has no speakers, choose the computer speakers instead. If the intended output is missing, reconnect it directly, avoiding a dock for the comparison. A supported Windows update or the computer manufacturer's audio package is safer than a generic driver updater.

macOS output checks

Open System Settings, choose Sound, and inspect Output. Select the intended speakers, confirm Output volume is not muted, and check Balance. Apple also advises disconnecting external audio devices when testing the built-in speakers.［2］

Some displays and interfaces expose several similarly named outputs. Select one, keep the volume low, and play the same local test sound. If a managed Mac prevents changes or an output repeatedly disappears, preserve the exact device name and ask the administrator or hardware vendor.

ChromeOS and Ubuntu output checks

On a Chromebook, open Quick Settings, expand the audio controls, and choose the intended output. Google documents separate volume and output controls, so a connected headset can keep receiving sound even when the visible volume is nonzero.［3］

On Ubuntu, open the sound panel, verify the output device and profile, and test the speakers there. Ubuntu's troubleshooting guide recommends checking volume, cables, the selected device, and recognized hardware before assuming a hardware failure.［4］

No sound from computer speakers? Check the physical audio path

Trace the path from the computer to the sound-producing device. Powered speakers need power as well as an audio signal. A headset may have an inline mute or volume control. A 3.5 mm plug can feel inserted while still being short of the final contact, and a dock may carry video without carrying the expected audio path.

Lower the computer and speaker volume.
Inspect the plug, cable, port, dock, and speaker power without opening equipment.
Reconnect one direct output, avoiding adapters and docks for the comparison.
Test the same output on another compatible source, if safe.
Test a known-compatible output on the computer.

These two substitutions answer different questions. If the speakers fail on another source, the speaker path is suspect. If known-good headphones also fail on the computer, the computer path is more likely. Do not force a plug into a port or use an adapter whose wiring and compatibility are unknown.

For USB devices that never appear, follow the USB recognition checklist. For an HDMI display that is also missing as a display, use the external monitor detection guide.

What should you check for Bluetooth, HDMI, and docks?

Bluetooth audio can be paired yet connected to another phone or computer. Confirm which host currently owns the connection, then select the Bluetooth device as the audio output. If it is not connecting at all, move to the Bluetooth headphone connection checklist rather than repeatedly deleting system audio state.

HDMI and USB-C docks combine several independent paths. A monitor may display video while audio is routed to its headphone jack, internal speakers, or no speaker hardware at all. Check the monitor's own volume and output menu, then compare a direct computer connection with the docked path.

If sound exists but is delayed, the routing path is working; use the separate Bluetooth audio-delay guide. This article does not cover distortion, crackling, one silent earbud, microphone input, or streaming video that shows a picture problem.

Why did the computer suddenly lose sound?

If sound worked a moment ago, look first at what changed just before it stopped. Plugging in or unplugging a monitor, dock, or headset can switch the default output, and paired Bluetooth earbuds or speakers in range can reconnect and take over playback. Microsoft names a wrong output device, muted sound, audio enhancements, and a faulty driver as the usual causes of silent speakers.［1］

Undo the most recent change first: disconnect the new accessory or turn off its Bluetooth, select the built-in speakers again, and replay the same local test sound at low volume. If the silence began right after a system update, restart once and note the update name before changing drivers.

When should you restart, update, or escalate?

Reopen the affected app after selecting the correct output. If every app remains silent, restart the computer once with unnecessary audio accessories disconnected. This clears a stuck session without deleting device records or custom settings.

Install supported operating-system updates and, when the device manufacturer provides one, the audio driver or firmware intended for the exact model. Do not install a bulk driver-updater utility, delete audio devices repeatedly, or run commands that remove the entire audio configuration without a recovery plan.

Escalate when the built-in output is absent after a supported restart and update, known-good direct outputs also fail, the audio device repeatedly disappears, or there is physical damage. Record the computer model, operating-system version, output name, direct-versus-dock result, and whether the failure began after an update, impact, or liquid exposure.

Summary

Begin with a known local sound and compare one app with all apps.
Turn the volume down, then verify the selected output and per-app mixer.
Test built-in and direct external paths before blaming drivers.
Treat Bluetooth, HDMI, and docks as separate routing branches.
Stop for physical hazards and use supported updates before hardware service.

FAQ

Why does my computer show volume but make no sound?

The level can be nonzero while sound is routed to HDMI, a dock, Bluetooth, a virtual device, or a different per-app output. Select the intended output and test a local sound at low volume.

Why does sound work in one app only?

The silent app may have its own mute, mixer level, output selection, or stuck audio session. Check the app controls and reopen it before changing system-wide settings.

Why did sound disappear after connecting a monitor?

HDMI can become the default audio output. Select the computer speakers if the monitor has no speakers, or check the monitor's volume and audio-output controls.

Should I reinstall the audio driver first?

No. First test app scope, routing, volume, cables, built-in speakers, and a direct known-good output. Use only the operating system or hardware manufacturer's supported driver when evidence points to that layer.

Can Bluetooth be connected but still not play sound?

Yes. The device may be connected to another host or connected while a different output remains selected. Confirm the active host and selected audio output.

Why do headphones work but the built-in speakers do not?

The selected output may still be the headphones, or the internal speaker path may have a software or hardware fault. Disconnect accessories, choose the built-in speakers, and test again at low volume.

Can a dock carry video but not sound?

Yes. Video, audio, charging, and USB functions can fail independently because they use different device capabilities and routes. Compare a direct connection and inspect the display's own audio capability.

When is no sound likely to need repair?

Repair is more likely when known-good direct outputs and built-in speakers both fail after supported software checks, the device disappears repeatedly, or there is damaged hardware, liquid, sparking, or a burning smell.

Sources

Microsoft Support — Fix audio issues when no sound plays from speakers or headphones — https://support.microsoft.com/en-US/Windows/Hardware/audio/fix-audio-issues-when-no-sound-plays-from-speakers-or-headphones-in-windows
Apple Support — If you cannot hear sound from your Mac speakers — https://support.apple.com/guide/mac-help/if-you-cant-hear-sound-from-your-speakers-mchlp1439/mac
Google Chromebook Help — Change volume and audio settings — https://support.google.com/chromebook/answer/10045949?hl=en
Ubuntu Desktop Guide — I cannot hear any sounds on the computer — https://help.ubuntu.com/stable/ubuntu-help/sound-nosound.html.en

Sources checked 4 October 2026.

Computer Has No Sound: What to Check