No sound " no audio output device " at hp pavillion dv6636nr

first of all : I know that my problem with a lot of users, but I hope to find a solution to this problem extended to slice is considerable
I have a HP Pavilion dv6636nr and my sound was working fine for a few years untill 3 monthes ago "No audio output device is installed i have windows 8 pro when i find this problem i flow some steps
1-i checked the bios and upgareted it from hp site " a final version "
2- i formate my laptop again and install my system windows 8 x32 and dwoanload all drivers from hp site at this link http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=2093&lc=en&cc=us&dlc=en&sw_lang=&product=3548... but the sound not work and show ( x ) remark on the speaker " no audio output devise is installed " so i am tired as many users likes me from this problem .
i see the device manager the sound device is not listed in it
and i use a driver geniuse it not listed to this too
note : i am not thik that problem from hardware " motherboard " becouse the sound works on Many times and be off Many times too
thanks for read my topic and wait your help " reply " on pins and needles
wait your help

welcome to the club
looks like there is no resolve on this problem thats why your not getting a response
have you tried the HP recovery manager
Click Start , type recovery into the search field, and then select Recovery Manager from the list.
Grant permission to continue, if prompted. The HP Recovery Manager opens.
On the Welcome to the Recovery Manager window, click the Advanced options button.
On the Advanced options window, select Hardware driver re-installation , and then click Next .
On the Welcome to hardware driver re-installer window, click Next .
On the Select a driver to reinstall window, select the audio or sound driver to reinstall, and then click Next .
Wait while HP Recovery Manager reinstalls the original audio driver, and then click Finish .
you will probably find like me that your audio driver is not listed so you cant re-install it good luck.
p.s when you downloaded your update driver from HP suport did you get an error message saying computer not compatible ?

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My speaker in bottom right for My sound say "No Audio Output Device Is Installed" and i have tried to go through many things to solve such as go into device manager and enable or update through there etc...to no avail.
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Dear Customer,
Welcome to the HP Consumer Support Forum!!
To isolate the issue please perform the steps below:
1. Restart the computer.
2. Check the Sound icon in the taskbar.
3. If the icon has an X in the lower corner, click the Sound icon in the taskbar or
4. Right-click the icon, and then click Troubleshoot sound problems.
5. The audio troubleshooter checks for sound problems. When the troubleshooter finishes, it displays the results.
6. If the computer has sound, the issue is resolved.
Install Original Realtek High Definition Audio Driver from the link below:
http://support.hp.com/us-en/drivers/selfservice/HP-Pavilion-Slimline-s5000-Desktop-PC-series/3942804...
From the above link click on Driver-Original > Original Realtek High Definition Audio Driver > Download and install the same.
In case the issue still persists and if the audio was working fine earlier, you may perform system restore to previous working condition using the steps mentioned in the link below:
http://bertk.mvps.org/html/restoresysv.html
Hope this helps, for any further queries reply to the post and feel free to join us again.
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Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
GR1
Although I am an HP employee, I am speaking for myself and not for HP

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this is not true because i have contexant (i think that's what it is called) speakers installed.
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This question was solved.
View Solution.

Hi, you can try the below steps to resolve the issue :
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1. Click Start, in the Start search box, type recovery . Then click Recovery Manager .
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3. In the Reinstall hardware drivers screen, click Yes . Then click Next. On the Welcome to Hardware Driver Reinstaller screen, click Next .
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Step 2 : Re-install audio drivers manually
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http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-63129-1&cc=us&dlc=en&lc=en&...
Step 3 : Restart the Windows Audio Service.
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3. Right-click Windows Audio , click Properties , and then verify that Startup Type is set to Automatic .
Restart the Notebook and check for the issue.
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As
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No sound " no audio output device " at hp pavillion dv6636nr

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