Gateway GT5412 sound stopped working

I worked on a client’s Gateway GT5412 desktop computer this week where it was not putting out any sound to the speakers.  The first thing I did was to plug the speakers into my iPhone, which resulting in the speakers working fine.  I then put headphones into the rear green jack and just heard the left ear humming.  I tried the front panel, too, but with the same result.бизнес

I found the sound card driver and updated it, restarted, but had the same result.  I didn’t find anyone via Google that had this problem before.

To fix it, I told an old PCI sound card from an old Windows 98 Gateway and put it in the new one.  I disabled the SigmaTel sound chip and Vista was able to find the driver via Windows Update automatically and the sound worked through there.

If you experience the same thing, comment here.