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Windows 7: No Audio Output Device is installed? Help, please!


01 Jun 2011   #1

Windows 7 Home Premium 64 bit
 
 
No Audio Output Device is installed? Help, please!

Hello, everyone.

I've searched the forums for topics related to this and none seem to be able to help. In a nutshell, my sound isn't working properly. For the past few weeks the sound has been mostly non-existent. An "x" in a circle sits above my speaker icon, and it says "No Audio Output Device is installed." On rare occasions when I turn my laptop on, the sound has mysteriously resumed working. But as soon as my computer Sleeps or Hibernates, the sound is out again indefinitely. Any idea what I should do?

So you know, I'm running Windows 7 Home Premium 64 bit. My laptop is an HP Pavilion Entertainment PC, dv2500 series. I've tried the whole install new driver thing with the Device Manager, but it tells me all drivers are up to date. I've uploaded a few screenshots so you guys can see.

Any help would be appreciated! Thanks.



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My System SpecsSystem Spec
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01 Jun 2011   #2

7 Ultimate x64
 
 

Just was at HP's site... strange experience. In your system's spec sheet, the only hardware they list for your sound is Altec Lansing speakers. Conspicuously absent is the audio chip. I can't find any software for 7; however, looking through 64-bit Vista drivers I found you have the Conexant High-Def Audio chip (not familiar with it).

Do you happen to have any drivers similar? Conexant High-Definition SmartAudio 221 Driver HP Pavilion dv2945se Entertainment Notebook PC - HP Customer Care (United States - English)

You don't need speaker drivers... you need drivers for the audio chip. That's why nothing is showing up under playback devices. Something strange is going on though, that's for sure. I've never heard of playback devices just up and disappearing.
My System SpecsSystem Spec
01 Jun 2011   #3

Windows 7 Home Premium 64 bit
 
 

Thanks for responding, Fumz! I checked and it turns out that my laptop already has the Conexant SmartAudio driver you pointed out. I went ahead and re-installed it anyway to see if that would make any difference. An error message popped up at the end. I've attached a snapshot of it...


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01 Jun 2011   #4

7 Ultimate x64
 
 

The message is telling you it can't find the audio chip... which isn't a good sign. One of two things is happening: either your audio chip is getting disabled in the bios, which is not very likely, but I've seen bioses do funky things before, or your chip is failing or has already failed.

That you've narrowed this down to hibernating is good sleuthing. Power down the machine for 2 minutes. We want it off, not sleeping or hibernating. Boot up into the bios and see if onboard audio is enabled. If it's not, enable it.

If things don't go as they should in the bios, meaning onboard audio is already enabled, and you boot up and still find no playback devices, then I'd take that machine directly to an HP store.

Is the machine still under warranty?
My System SpecsSystem Spec
01 Jun 2011   #5

Windows 7 Home Premium 64 bit
 
 

Fumz, you're amazing, pal.

I powered it down, waited the 2 mins, and booted up into the bios as you recommended. I discovered that the Button Sound in the System Configuration (the only thing I could find that related to the audio) was Enabled, as you can see in the snapshot I've provided. Surprise, surprise, though, when I booted up my computer, the sound is now working! There is no longer an "x" over the sound icon that tells me "No Audio Output Device is installed." As you can see, I checked the Playback Devices dialog box and there are now two items listed where the used to be none.

But I'm not entirely sure what to make of this, since the sound was already enabled when I entered the bios. I'm afraid this may just be one of those rare occasions I described earlier, and as soon as I enter sleep or hibernation mode the sound will be gone again indefinitely.

My laptop is no longer under warranty, so I probably won't be taking it to HP. For the past few years this machine has served me extremely well aside from the sound weirdness, but that's been enough to get me interested in purchasing a new computer.


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My System SpecsSystem Spec
01 Jun 2011   #6

Windows 7 Home Premium 64 bit
 
 

Oh, and what's more, I still get the error message when trying to install the Conexant audio chip driver. Weird, huh?
My System SpecsSystem Spec
01 Jun 2011   #7

7 Ultimate x64
 
 

It is very strange behavior, and after a quick google search, apparently it's a problem more common than I thought. For years guys have been having the same issue with Conexant sound chips.

Have you tried to disable Hibernate to see if that solves the problem? The computer would still be able to sleep... although to be honest, I have no clue what the difference is between Hibernate and Sleep.

Just a heads up... make sure your next machine doesn't have a Conexant sound chip...
My System SpecsSystem Spec
02 Jun 2011   #8

Windows 7 Home Premium 64 bit
 
 

Okie doke, Fumz. I'll check in to the hibernate thing, and in the future I'll be careful not to touch a Conexant-equipped computer with a ten-foot pole. haha Thanks again for your help. It was very kind of you, and I'm grateful. Take care!
My System SpecsSystem Spec
08 Feb 2013   #9

windows 7 home premium
 
 
i have the same problem

i dont know what to do...
My System SpecsSystem Spec
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 No Audio Output Device is installed? Help, please!




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