No sound from built-in speakers when all external speakers and the headset are disconnected
Before troubleshooting sound problems with external speakers or headsets, confirm that sound is audible from the built-in speakers on the notebook. Disconnect all external speakers and headsets, and 
Perform a simple sound system test  . Troubleshoot the sound problem to identify the root cause by performing the following actions.
Once you have verified that the sound works properly, connect the external speakers to check the sound. If there is still no sound or low sound, verify that the speakers are powered speakers. Older style passive speakers are not compatible. Please see 
Resolving Sound Problems with External Speakers and Headsets   for more information.
If these issues do not apply, or if there is still no sound, please see  
Resolving Sound Problems when Unplugging a USB Device or Receiving An Error Message   for more information.
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Check the volume and mute settings
If sound is not audible, it is possible that the sound control is turned down or set to mute. There are separate sound controls for the hardware devices (speakers / head sets) and the individual applications (Windows sound / QuickPlay / Windows Media Player). For example, if the speaker is turned on, but the application is muted, you will not hear any sound. You should open the sound volume mixer and check the different settings.
NOTE: If the volume for an application, such as Windows Media Player, was adjusted using the volume buttons or slider controls on the notebook case, the system will use that volume setting, even if the master volume control is adjusted to a higher setting.
To check the volume and mute settings, follow the steps below.
- Double-click the sound icon 
	
	
		
		
	
	
  in the task bar, and then select Mixer . All of the active sound applications display.
 Figure 1: Volume Mixer
 
- Confirm the volume for the device in question is not set to mute. The icon at the bottom of the volume control displays the universal no  symbol when a device is muted.  Click the icon to toggle between mute 
	
	
		
		
	
	
  and sound 
	
	
		
		
	
	
 .
 
 NOTE: Because each sound device has its own mixer control, click the icon   
	
	
		
		
	
	
  to enable sound for muted devices.
- Drag the slider bars to the highest volume settings, and then test the sound again.
The sound should now be restored.  Adjust the volume to a comfortable setting.  If sound does not restore, please see the 
Test the sound devices   section of this document for more information.
NOTE: If the computer has a feature where you can slide your finger along a graduated strip above the keypad to change the volume, the capacitive touch mute button may become stuck in the muted position and prevent the playback of sound. To resolve this specific issue, download and install the latest BIOS for your particular computer model. 
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Test the sound devices
When the external speakers are disconnected, the sound device named 
Speakers  must be selected as the 
default  and must be 
enabled . 
NOTE: The notebook speakers will not work if 
Bluetooth Speakers  or 
Digital Output  is selected as the default sound device.
If the sound for the notebook speakers was not restored after performing the 
Checking the volume and mute settings   actions, test the sound devices by following the steps below.
- Double-click the sound icon  
	
	
		
		
	
	
    in the task bar, and then select Mixer  to display controls for all of the sound applications.
- Click Start , type Sound  into the search field, and then select Sound  from the list when it becomes available.
 Figure 2: Playback Sound Window and Mixer Showing Multiple Sound Devices
 
- Verify that the Speakers  sound device is set as the default device, and is enabled.
 
 NOTE: If the Speakers  sound device is not listed, right-click anywhere on the Playback  tab of the Sound window, and then select both the Show Disabled Devices  and the Show Disconnected Devices  options.
- If the Speakers  sound option  is Disabled , right-click Speakers , and then select the Enable  option.
- Right-click Speakers  and then click Test .  Sound should be audible through the notebook's speakers.
- If sound is not audible, click Configure  to verify the operation of the individual speakers.
The sound should now be restored.  If the 
Speakers  sound device is still not working properly, please see the 
Verify that the sound device is enabled in Device Manager   section of this document.
Perform a simple sound system test
To perform a simple sound system test, follow the steps below.
- Double-click the sound icon 
	
	
		
		
	
	
   in the task bar, and then select Mixer  to display controls for all of the sound applications.
- Click Start , Control Panel , and then  select Sound  or Hardware and Sound .
- From the Sounds  tab, select any option under Program  that has the Sound icon next to it, such as Asterisk, and then click Test . Sound should be audible through the notebook's speakers.
  If sound is not audible, please see the 
Check the volume and mute settings   section of this document.