my pc :
Motherboard: A8N Sli
Card: Nvidia 8800 GTX
card Driver: 304.79
onBoard audio not working and not showing in device manager.
sound driver : Realtek AC 97
Everything started, when my 8600gt got fried.
so I bought a 8800 GTX and installed.
everything was great untill i fired up a game called league of legend.
then 10min within the game. my sound started sounding weird with static.
then next day. my sound stop working.
1) Uninstalling and re-installing both realtek(from realtek.com) and nvidai (from nvidia.com) driver.
2)Uninstalled and let windows install the needed driver. and still nothing.
3) I tried "Driver Detective" software.
4) Windows Audio services is running and is set on auto start on startup
5) No driver from http://support.asus.com/download.aspx?SLanguage=en&p=1&...
Download and install this app: http://treexy.com/products/driver-fusion.aspx , uninstall your current sound drivers, reboot into safe mode and open up the program, scan for realtek files and eliminate all of them, this will delete all/almost all files that a regular uninstall doesn't and could be causing conflicts, then reboot into normal mode and install the latest drivers for your realtek card.
Rule out driver issues first, you could also try a different OS to see if it produces sound, just download any linux distribution and run as as live-CD, If sound works in that case then it's just a windows-related issue and most likely reinstalling windows would fix it.
treexy didnt work.............but windows update is asking to install a "ATK - System - ATK0110 ACPI UTILITY 16k". However, everytime i click install it says "failed try again". which puts me in a loop of try and fail.
I went into the bio and check audio. the AC 97 Audio is enabled.
Now I'm installing Ubuntu with window installer as I type.
Not necessarily a driver issue, if a piece of hardware is damaged that doesn't mean it won't function at all, but it may function erratically.
I'd say backup your stuff and do a reformat and clean install of windows, if problem persists, there are plenty of usb sound cards you can get for under $30 that will produce much better sound quality than that aging AC'97, and you'll get rid of the issues if it's hardware related.