Question about HP Computers & Internet

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Suddenly no sound. I've got an HP p6404y desktop with Windows Ultimate installed with the x in the red circle by the speaker icon and the message No Audio Output Driver is installed. I've downloaded new drivers from HP and from other online sources and tried to let Windows find a drive, all to no avail. Still no sound. Yes, I deleted the old dirvers before installing new ones.

Posted by Stephen Landman on

  • 1 more comment 
  • Stephen Landman Feb 10, 2011

    Sorry. I logged on as Administrator and tried to install the propeer driver for my Windows 64bit Ultimate machine, restarted the computer, bit the problem persists.

  • Stephen Landman Feb 10, 2011

    I downloaded the original proper driver from HP for my Windows 7 Ultimate 64 bt machine, logged on as Administrator, tried installing the driver, but the problem persists.

  • Stephen Landman Feb 10, 2011


    When you say boot into the BIOS, I assume you mean the setup screens. I did that, and did not see a sound card mentioned. The closes was "Onboard Audio" which is set to "Auto."




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Hi, I am Steve, lets get you some help.
You say you have uninstalled the sound drivers, installed then from the manufacturers site and allowed Windows to find its own drivers. Ok.
Your machine as standard comes with Realtek onboard sound. Assuming you are still using this and have not fitted a sound card then we have a couple of other checks before deciding it is physically broken.
Boot into the BIOS and ensure that on board sound is enabled. Uninstall the sounds drivers and the sound device - do not uninstall the codecs reboot the machine install the HP sound drivers
If this does not work, let me know if the event log is generating any errors.
If you have added a sound card - please let me know what make and model it is as this will require separate troubleshooting.

Posted on Feb 10, 2011

  • Anonymous Feb 10, 2011

    The fact that it is set to auto is ok, but it does not fully tell me if we are using realtek or a sound card.

    Try start, run, devmgmt.msc and a new window will open, expand the sound video and game controllers.

    Please tell me whether and devices have a yellow question mark. Also if a sound device shows open the properties and see if any error is recorded.

    Finally run eventvwr.msc and in the new window that opens look for errors in the application log - let me know the last error.



Jose Cada

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Welcome to Fixya

Click start menu then click control panel. Go to system the click device manager. Go to sound and video game controllers then delete everything there. Doenaload and install the sound driver of your computer using this link. Then restart your computer once you are done.

Please reply this email for any updates.

Thank you for usign Fixya!

If you need further help, reach me via phone at

Posted on Feb 10, 2011

  • Jose Cada
    Jose Cada Feb 10, 2011

    you should be able to restore the sound by now if you followed the procedure. there is nothing much special in installing the sound card driver and i am sure you are aware of that. In this case, this is already a hardware problem. The sound card might have gone bad and need replacement.



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