no noise and it says no audio device installed

Hi, I have problems with the sound on my HP pavilion dv6745us that has windows vista.  The taskbar shows no audio output device is installed, and when I open the volume reading tabs and recording say the same thing, even when I click on disabled and disconnected. They are not listed under Device Manager sounds either. More funny thing is once occasionally it works after it was closed for a while. It only stays on for a short while maybe 1/2 to 1 hour, and then turns off. When turned on, it shows audio hd conexant smart 221. I tried everything with the Device Manager and it does not at all appear here. Its as if it does not exist in the computer. I guess it's something to do with the driver and have looked everywhere for updates, but there is not. I saw one in the history of the update that failed at about 2 weeks before that I started to have problems, but it won't let me try again. I don't know much about computers so I hope that the answer is simple. Thank you

Looks like your sound card may be faulty...

The following HP support site may be worth a visit:

Software downloads & Driver - HP Pavilion dv6745us notebook PC
http://h10025.www1.HP.com/ewfrf/wc/softwareCategory?cc=us&LC=en&DLC=en&product=3646950

Tags: Windows

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