If your computer is unable to produce sounds, there are multiple simple steps you can take to attempt to fix it. This does not cover sound problems related to specific programs or third-party hardware such as surround sound speaker systems.
If you have speakers, make sure they're plugged into a working power source and turned on.
Ensure the sound is not muted
Check Sound Settings
Check that none of the audio output devices are disabled
Check using headphones
The easiest way is to connect headphones. If the headphones work but the internal speakers do not, it's possible that the computer thinks that headphones are connected when they're not. When you plug in headphones, most computers automatically cut the sound to the speakers. Try connecting and disconnecting the headphones repeatedly. This can dislodge dust that might be stuck in the headphone port.
Check that the correct jack (connector) is being used
Many computers have three or more jacks that connect to a sound card or sound processor, including a microphone jack, line-in jack, and line-out jack. Your speakers or headphones should be plugged in to the line-out jack. If you're not sure which jack this is, try plugging in to each of the jacks to see if any of them produce sound.
Reinstall the sound driver
If that doesn't help, try reinstalling the sound driver. An issue here may be be identified by a Yellow question mark next to the device.
Update the Driver
Click here for instructions on how to find updated drivers for your model. Select "Sound" as the category in the list and pick the appropriate sound driver for the laptop to download and install.
Try performing a System Restore if the sound stopped working after new software or device was installed. Using System Restore will restore Windows drivers and settings without altering personal files and documents.
Windows 10: How do I perform a system restore in Windows 10?
Windows 7: How To: Perform a system restore
Microsoft's information in the link below is designed to help solve common sound problems in Windows, including no sound from your speakers or headphones. This does not cover sound problems related to specific programs.
System Recovery / Reset
If none of these fixes alleviates the sound problem, try performing a System Recovery. Recovering the laptop to its original, out-of-the-box state is a great way to eliminate software as a possible cause of the problem. Note that doing a system recovery will return the laptop to its default conditions, completely wiping all data (personal documents, installed applications, and everything else).
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