Hello Billdickey44,
Thank you for updating me with that information. Based on the link in my previous reply. The monitor has an Audio line-out port which states that you need to have an external speaker connected to that particular audio port in order to have sound. Connecting a headset to that port is not supported.
Kindly let me know if this helps or if you have any further concerns.
Kind regards,
John DeV
Independent Advisor