Start with the simple checks. Change one thing at a time so you can tell which step helped.
Audio may be sent to a monitor, Bluetooth headset or disconnected output instead of the speakers you expect. First, note what changed recently and whether the same issue affects another device. This helps separate a device-specific fault from a wider network or service issue.
Troubleshooting steps
Check the basics
Select the intended output device in Windows sound settings and raise its volume carefully. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Review the settings
Check app volume, system mute and any physical speaker or headset controls. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Test one change
Reconnect the audio device or remove and re-pair Bluetooth headphones. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Confirm the result
Run the built-in audio troubleshooter and review any specific error it reports. After each change, repeat the action that originally failed and give the device a moment to reconnect or refresh.
Helpful note
If sound fails in every app, install audio updates only from Windows or the PC manufacturer.
When to get more help
If these checks do not resolve the issue, contact the relevant device maker, internet provider or app support team. Include the exact model, software version, any error message, what you have already tried and when the problem began. Avoid sharing passwords, verification codes or private account details in a public forum.
For equipment that is hot, damaged, wet or making unusual electrical sounds, stop using it and seek qualified support. Do not open power supplies, batteries or mains-powered equipment.
Settings and menu names vary by model and software version. Use the manufacturer's current instructions for device-specific steps, and back up important files before making changes that could remove data.