I have lost the sound on my HP 620 laptop. In the Audio control and device manager everything looks fine: drivers are visible and it's stated "This device is working correctly". I can see the green gauge in the Volume control moving when I test audio, BUT nothing comes out of the internal speakers.
There are two devices in Audio playback tab:
Speakers/Earphones IDT High Definition Audio CODEC and
Earphones (real time data) IDT High Definition Audio CODEC.
I tried uninstalling the Speakers/Earphones device, downloading the latest driver from HP and installing again, but no luck.
When I connect the laptop to the TV via HDMI the sound works fine.
The only major change I can think of now is a BIOS update which HP Support Assistant did on June 2. The sound problems started before that.
I haver an HP 620 Serial number: {Personal Information Removed}, Product number: WT249EA#UUW, Vista 64 bit.
Hope someone can help, Mikael