My Elitebook went back to HP under warranty as the screen starting breaking away from the lid. I reset Windows before dispatch, and so had to reinstall everything when it was returned to me. Despite working through all the various HP and Windows updates carefully the headphone socket (which was fine before the repair) will not function. When headphones are plugged in the laptop speakers keep playing, and no sound comes thru the headphones.
I checked inside the socket for any physical issue, and that looks ok.
Have tried manually deleting the drivers and reinstalling, rebooting etc etc and no progress. As HP support are shut until Monday does anyone have any ideas? It seems most likely that the issue is software rather than hardware.