Help Please!! no audio output device installed?

Hi. I have a satellite A215-S4757 last night I installed some windows updats  went to bed because it was going to take awhile. When I got it had finished and was in sleep mode. When I turned it on I noticed the sound was on mute. Or I thought it was. When I attempted to turn the sound on I recieved the message "No audio output device installed". I updated BIOs 2.30 but that didnt work. If anyone could help me out I would greatly appreciate it!
Thanks

Try this!  Looks like you have Realtek audio.  I was having the same problem until I installed the updated Realtek driver directly from Realtek site.
As many users have posted, I was having this problem with my Satellite L505-S5990. I tried most of the suggestions I could find here and on the 'net to no avail. I was surprised to see that this problem affected many laptop brands - even as far back as Windows XP!!
Last week I think I finally found the answer (or at least Realtek did). My laptop has Realtek HD audio, and the drivers that came with laptop seemed to be the culprit. I checked the Realtek site last week, and they have an updated driver, dated 3/30/2010, for Windows 7 as well as other versions of Windows. It is Version 2.46.
I downloaded and installed these drivers, switched back to going into sleep mode rather than hibernate and - so far - the computer wakes from sleep with sound intact!!!
Hopefully these drivers will work for others.

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    ** If your problem is solved then Mark this as Answer! **
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    “I am an HP Employee“
    ***** Click the KUDOS star on the left to say 'Thanks'**
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  • No Audio Output Device is installed

    Hi,
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    What you are describing seems as if the sound device mute might be enabled.
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    erico
    ****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
    2015 Microsoft MVP - Windows Experience Consumer

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