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1. Click Start  , and then click Control Panel .
2. Under System and Security , click Find and fix problems .
   Figure 1: Opening the troubleshooter

   
3. The Troubleshoot computer problems page opens. Under Hardware and Sound , click Troubleshoot audio playback .
   Figure 2: Troubleshooting audio playback

   
4. The Playing audio troubleshooting page displays. Click Next to continue.
   Figure 3: Playing Audio troubleshooter

   
5. Wait while the troubleshooter checks the computer for problems.
   Figure 4: Checking for audio problems

   
6. If multiple audio devices are connected, select the device you want to troubleshoot, such as speakers. Then click Next .
   Figure 5: Selecting a device to troubleshoot

   
7. Wait while the troubleshooter detects problems and makes changes.
   Figure 6: Detecting problems

   
8. When the troubleshooter is done, the Troubleshooting has completed page displays listing any problems found and what changes were made to the computer. Click Close .
   

   NOTE:For detailed information about the troubleshooting, click View detailed information .
   Figure 7: Troubleshooting completed

   

The volume setting for one or more sound devices might be disabled or set too low. 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.

To check the volume and mute settings, follow the steps below.

1. Click the sound icon  in the task bar, and then select Mixer . All of the active sound applications display.
   Figure 8: Volume Mixer
   
2. Make sure the volume is not muted by looking at the Mute buttons below the volume slider. If the button displays a small red circle, the volume is muted.
   If the volume is muted, click the Mute button to enable sound. The red circle on the speaker icon disappears when sound is no longer muted.

   Sound muted	Sound not muted

3. After verifying that the sound is not muted, drag the volume adjuster up until it is at 75%.
4. To test, click the volume slider bar. If you hear a ding sound from all speakers, you are finished troubleshooting.
   Figure 9: Testing volume

   
   If you still do not hear any sound, continue with the next step.

1. If headphones are connected and you are not using them as your main speakers, disconnect the headphones now. Connecting headphones to the computer mutes other speakers.
2. Click Start  , and type Sound into the Search box.
3. In the search results, click Sound under the Programs list.
4. In the Sound window, select your Playback Device and click the Set Default button.
   Figure 10: Selecting the default device (your audio devices might be different)

   
5. With the default Playback Device selected, click the Configure button.
6. Click your type of speaker setup in Audio channels .
   Figure 11: Typical speaker setup for notebooks

   
7. Click the Test button to send sound to each speaker, or click an individual speaker to send sound to it.
8. If sound is heard correctly from each speaker, you are finished.
   If sound is missing from all or one of the speakers, or if the configuration type was changed, continue with speaker setup by clicking Next . Follow the on-screen instructions to complete the speaker setup.
   Play a sound. If sound problems persist, continue to the next section.

If you are experiencing issues with the mute button and/or the slide bar located above the keyboard keys, do the following:

1. Verify that you have the latest BIOS installed and if not, see Install updated firmware (BIOS) for instructions on updating the BIOS.
2. If your BIOS is up-to-date or if the issue still exists after updating the BIOS, contact an HP support agent for additional assistance.

A high-definition audio device on a notebook PC may no longer work after restarting Windows 7 or resuming from hibernation/sleep. The device may be a sound device or a modem. You also may see an "X" character appear on the speaker icon in the notification area.

To resolve this issue, re-scan the device in Device Manager by performing the following:

Click Start , enter device into the search field, and then select Device Manager from the list when it becomes available.
Highlight and right-click Sound, video and game controllers .
Choose Scan for hardware changes .

The high-definition audio device will detect hardware changes and the "X" character should no longer appear on the speaker icon.

Sound files and settings that become changed can cause sound problems. Restore the audio driver to reset audio settings for the sound hardware and reinitialize the sound configuration in Windows.

Use the driver recovery process to restore audio drivers for the original sound hardware using the following steps:

1. Click Start  , All Programs , Recovery Manager , and then click Recovery Manager again.
   Figure 12: Recovery Manager

   
2. Click Hardware Driver Reinstallation .
3. On the Hardware Driver Reinstallation welcome screen, click Next .
4. Select the audio driver to reinstall, and then click Next .
   Figure 13: Select the driver to reinstall

   
   

   NOTE: If the driver you want to reinstall is not listed, select The driver is not in the list , and then click Next . Helpful information will advise you how to install drivers using the Windows Device Manager. Follow the onscreen instructions.
5. The Recovery Manager begins reinstalling the chosen driver. After the driver installation is complete, clickFinish to restart the computer.
6. After restarting the computer, test for sound. If there is still no sound, continue to Step 7: Update the audio driver .

If you are unable to reinstall the driver using Recovery Manager, roll back to the previously installed driver through Control Panel:

1. Click Start  , and enter Device Manager into the Search field. Click Device Manager .
   Figure 14: Opening Device Manager

   
2. Click Sound, video and game controllers .
3. Right-click the name of the audio device and select Properties .\
   Figure 15: Device Manager audio device properties

   
4. Click the Driver tab.
5. Click Roll Back Driver .
   Figure 16: Audio Properties

   
6. Click Yes to roll back to the previous driver.
7. Test for sound.

If there is still no sound, continue to the next step to update the audio driver.

An updated audio driver might resolve the problem if the computer is experiencing sound problems after upgrading the operating system to Windows 7, or the computer is experiencing sound problems in a particular software program.

Click the following heading or the accompanying plus (+) sign to expand the information.

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If you cannot hear sound, check Device Manager to determine the state of the sound hardware.

1. Click Start  , and type device manager into the Start Search field.
   The Device Manager window opens.
2. Double-click Sound, video and game controllers .
3. Do the following, depending on what displays:
   If a sound device is not listed , the sound hardware is not being detected by Windows. Test for Hardware Failure .
   If a sound device is listed with a down arrow , the device is disabled. Right-click the sound device name and select Enable to re-enable the device. Go to the next step if problems continue after enabling the device.
   Figure 21: Enabling a disabled sound device
   
   If a sound device is listed , right-click the device name and select Properties to view more helpful troubleshooting information in the Device Status window. If Device Status shows that the device is working correctly, the problem is probably related to sound settings, the speakers, or the cables.

Play a sound. If sound problems continue, test the sound hardware using HP Support Assistant. For more information, see Testing Hardware Using HP Support Assistant and Vision Diagnostics (Windows 7) .