I have uninstalled and reinstalled the audio driver and also downloaded the driver from Dell but it still can't find device (icon on taskbar says No Audio Output Device is installed). When I try to update the driver it can't find anything. Actually since I uninstalled the original device, and tried reinstalling it, it now shows up under "Other devices" on the Device Manager instead of Audio device. I ran the pre-boot diagnostic test and the audio part works fine. I'm at a loss here....I'm wondering if maybe a Windows update changed the way it recognizes drivers or something. I also tried installing a wireless Microsoft mouse (downloaded the software) and it can't find the driver.
Download Driver Cleaner Pro v.15 from the link. Also, download, and save on your desktop, a clean version of your Sound Card drivers. Run DCPv1.5 and remove all of your audio drivers, plus any possible problem drivers (i.e., if you installed generic drivers to try and get your card to work). After you uninstall, reboot, install your downloaded drivers and reboot again. This should fix your problem, if not please post an update to this thread and I'll continue troubleshooting with you.
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try rolling back you audio driver, if you get no results then uninstall and download reinstall it. most dell computers come with the drivers in a folder in "my computer". Alternatively you can find the driver from dell http://tinyurl.com/ljlkeq
Uninstall and reinstall the audio drivers. That should fix it. Also check in Audio/Sound properties in Control panel under Recording and check if the Array mic is detected and set as default. Try downloading "http://ftp.us.dell.com/audio/R171786.exe"
You need to set the internal mic as the default input device. To check this Right click on the sound icon next to the time and select Recording properties. In the Recording properties right click on Arrey Microphone and select set as default. If this does not help. Uninstall and reinstall the sound drivers. To uninstall the sound drivers click on start and type DEVICE. Open device manager from the results and then look for sound devices. Click on the Plus sign next to Saound and audio devices. Right click on the SigmaTel entry there and select uninstall. Put a check on remove this driver from the computer. Once done restart the computer and go to support.dell.com and click on Drivers and Downloads. Enter your system service tag and download the Sigmatel audio drivers and install them. Check if the MIC works after the restart. If the Arrey microphone is set as the default and you have uninstalled and resinstalled the drivers and it does not work in MSN try recording with the Windows sound recorder and see if it works there. To open the sound recorder click on start and type SOUND. Open sound recorder from the results. Incase the mic does not record even in the recorder it could be bad or have a loose connection. If in warranty call/chat with the Dell technical support. If the warranty has expired consult a local computer guy.