no audio output device installed

I have an Intel MB d946gzis whith a Sigma Tel High Definition Audio Codecd
ver 6.10.5405.0, it worked initially not the speaker in the bottom right
says, "no audio output device installed" I have uninstalled it, and re
booted, it re installs but not success.

BTW i'm running Vista Business on core 2 duo 1.66 mhz w/2gb kingston memory.

Where do I go from her, the Sound used to work quite well!!!

I have the same problem. After one of the Windows Updates, the driver
wouldn't load so I reverted back to the original one. Now, even though it
says it's installed and working properly in the control panel, it says 'no
audio device installed' in the volume mixer. I'm running Vista Home Premium,
dual core 2.13Ghz, 1 Gb ram. Anyone have a solution??

Hello Shayne.

About a weel ago microsoft released a new driver for these sound cards, i
have one. Well that driver steps all over them and stops sound from working.

uninstalling did not seem to help, reinstalling old driver did not work.

I ended up going to windows restore, and going back to before downloading
and installing optional update driver for the sound card. that has solved my
problem with sound card. i should work for you as well.

I am having the same problem. Do any of you know which update was causing
the problem...>

yes it was Sigma Tel High Definition Audio Codecd optional update

It sounds like you might have an audio driver not working properly, please do the following:
1. Click Start
2. In ‘Start Search’ type Device Manager, press Enter (provide administrative credentials if prompted)
3. Click the “+” next to Sound, video and game controllers to drop down the menu
4. Check the status of any device listed in that category by right-clicking that device, clicking Properties, and then under the General tab check what it says under “Device status”. Let us know what the status was.
5. Then check all the devices (especially any that had a problem under “Device status”) listed in this category for updated drivers by right-clicking that device and then clicking Update Driver Software… (this step may take a moment so be patient).