AC97 Win 7 Compaq Presario SR1710NX

Im trying to help out one of my friends with his system for some reason at first his audio worked like a dream then he put his new graphics card in and every thing went down hill from there his video card works fine but he has no sound the card is a Nvidia GeForce GT 220 with HDMI well the HDMI audio is found but now his sound card has turned to a unknown driver i have uninstalled all drivers for both and tried reinstalling just the audio card drivers and i have even tried running the system in safe mode to no avale and im stumped and getting he is getting madder by the second

Try uninstalling the sound in the Device Manager(do not uninstall the drivers), then restart the PC and when Windows starts it should detect and reinstall it. I've seen problems where a new device has caused another device to not start and doing the uninstall/reinstall fixed it.

fireberd said:

Try uninstalling the sound in the Device Manager(do not uninstall the drivers), then restart the PC and when Windows starts it should detect and reinstall it. I've seen problems where a new device has caused another device to not start and doing the uninstall/reinstall fixed it.

By uninstall the sound do you mean uninstall the device if so i have done that 5 times over to no avail

I understand that I am a few months late, but I had the same problem with my Radeon HD3450. What happened with mine is when I installed the new video card it installed a sound driver to put all the sound through the HDMI port that wasn't there unless I had the adapter. The HDMI driver disabled my On-board audio, so I had to go back into the BIOS and re-enable it. I hope this helps if you haven't found a solution yet.