My sound is not working at all and I can't figure out the problem. HP DV6810 Laptop Vista Home premium Symptom: Sound does not come through speakers or headphone jack. The "speaker" in the system tray has a red x. I tried opening the mixer but it is greyed out. I checked the device manager and there are only drivers for bluetooth. (I'm not sure what those are for). I deleted those drivers and rebooted the computer. The system recognized the sound card but only installed the bluetooth drivers again. Can someone give me some guidance?