Hello,
My model doesn't have an HDMI port, it has S Video & VGA but blank spot where the HDMI option would be. There is a red x where the volume is and when I run audio troubleshooter it checks everything & says hardware changes might not have been detected. Have you heard of a Coprecessor controlling or causing sound not to work? I read on a forum that it's why I don't have sound and it's the only thing in the Device Manager that has a ? on it. Thank you very much for any help you could provide and thank you for taking the time to help.