Okay, so my problem is:

I recently added a graphics card to my windows 8.1 PC. The card itself works fine (a GTX 750Ti), but since installing it my sound no longer works from either port. Things I have already tried:

• Rebooting (obviously)
• Taking the card out and then replacing it
• Going through all the control panel audio settings (more on this later)
• Disabling the HDMI audio on the card
• Trying different (provably working) speakers and headphones
• Updating/installing drivers (not that you need them for headphones)

The "playback devices" screen declared that nothing whatsoever is plugged in (it is). I'm concerned I might have damaged something during installation, but nothing seems obviously damaged, and I would have expected static to either do no damage or wipe out the entire motherboard. The back port is working, so it isn't the cable. My monitor output is HDMI (with no speakers on the monitor), if that makes any difference.

Penny for anyone's thoughts?

Have you tried taking the card out and booting either your old card or onboard video to see if the card itself is causing the problem?

EDIT: You might also want to check and see if sound card audio drivers were installed and uninstall them. Even though you disabled the HDMI sound on the card the drivers may be interfering. You should also check to make sure your onboard audio hasn't been disabled.

• Edited by Acreed02 12 hours 12 minutes ago

Have you tried taking the card out and booting either your old card or onboard video to see if the card itself is causing the problem?

EDIT: You might also want to check and see if sound card audio drivers were installed and uninstall them. Even though you disabled the HDMI sound on the card the drivers may be interfering. You should also check to make sure your onboard audio hasn't been disabled.

• Edited by Acreed02 Tuesday, March 24, 2015 7:07 PM

Have you tried taking the card out and booting either your old card or onboard video to see if the card itself is causing the problem?

EDIT: You might also want to check and see if sound card audio drivers were installed and uninstall them. Even though you disabled the HDMI sound on the card the drivers may be interfering. You should also check to make sure your onboard audio hasn't been disabled.

• Edited by Acreed02 Tuesday, March 24, 2015 7:07 PM
• Proposed as answer by FangZhou ChenMicrosoft contingent staff, Moderator 5 hours 45 minutes ago

Have you tried taking the card out and booting either your old card or onboard video to see if the card itself is causing the problem?

EDIT: You might also want to check and see if sound card audio drivers were installed and uninstall them. Even though you disabled the HDMI sound on the card the drivers may be interfering. You should also check to make sure your onboard audio hasn't been disabled.

• Edited by Acreed02 Tuesday, March 24, 2015 7:07 PM
• Proposed as answer by FangZhou ChenMicrosoft contingent staff, Moderator Thursday, April 02, 2015 1:35 AM

Have you tried taking the card out and booting either your old card or onboard video to see if the card itself is causing the problem?

EDIT: You might also want to check and see if sound card audio drivers were installed and uninstall them. Even though you disabled the HDMI sound on the card the drivers may be interfering. You should also check to make sure your onboard audio hasn't been disabled.

• Edited by Acreed02 Tuesday, March 24, 2015 7:07 PM
• Proposed as answer by FangZhou ChenMicrosoft contingent staff, Moderator Thursday, April 02, 2015 1:35 AM

Hi,

In my opinion, you issue is more related to the graphics card driver, it's better to get the new driver applied to your graphics card and OS model.

I'm afraid not, my graphics card drivers are all up to date.

Check if your grap card is proper for this model of computer. And then you may need reinstall them completely.

The graphics card is correct for my computer, and working perfectly as a graphics card. I've uninstalled all audio drivers without success. I haven't yet bad the opportunity to try removing the graphics card and trying with onboard graphics, because my new monitor doesn't have a VGA port (the only type my onboard graphics is compatible with) but I'm acquiring a converter, and will check if I have sound without the graphics card.

The back port is working, so it isn't the cable.

Im confused as to what this means. If you have audio via the ports on the back of the computer but not in front ports you may have damaged the front audio cable or connection on the motherboard or at the front ports. Find the HD Audio (or AC97) port on your motherboard and verify that the cable is connected and intact, then follow this cable forward to your front audio ports. If you stressed this cable by tugging or pushing, it could have damaged the connection to the front ports. Sometimes these ports are connected by a header like the motherboard and this connection could have come loose.

Brandon
Windows Outreach Team- IT Pro
Windows for IT Pros on TechNet