Thanks but as I said I have already done every procedure from every online tutorial on this topic, including a session with a live tech guru from Dell, who basically had me repeat steps that I had already done. The Default Set is the first thing I did. I have uninstalled, rolled back, checked that everything is operating [it is]. I can see the green bars moving on the volume graphic but there is no sound on the monitor. I have optimised all volume controls on both laptop and tv. I am at a loss. Windows troubleshooter says everything is working. The only comment they make is regarding my GENERIC TV?? I have tried every HDMI port [there are 3] I have reversed the cable. In short I have done everything available online over the past 2 days and still no audio on the monitor. So when I say I have tried ALL the obvious solutions, I am looking for the one I may have missed. Thanks for your suggestion though. S