At work yesterday I had to replace a graphic card on a computer and by doing so the computer lost the ability to output sounds.
I'm looking at the Windows sound properties and I see no playback devices (I have show disabled/disconnected devices). When going to the Device Manager I see 4 NVIDIA High Definition Audio entries but they don't seem to do much. The new card is an NVIDIA Quadro 4000, two DisplayPort outputs and a DVI. I tried re-installing the audio drivers from Dell and they are too old to be installed on Windows 7. I did install the new GPU drivers but it didn't do anything to the sound.
This is a work environement so I can't install speakers on workstations. Users mostly use headphones.
What can I do to get sound back ?