VG is Video Graphic cable ....anyway I have found my own solution so I will share it here.
Simply right click on the sound icon on the task bar.
Then choose trouble shoot sound problems.
Let that run and it found the issue. There were 2 "speakers" and it had reassigned to the wrong one...
The moment I plug in my HDMI second monitor I don't get any sound.
I have a regular monitor plugged into the port -YES
Have I rebooted -YES
In the sound settings is the Dell ST2410 speakers set to default -YES
Have a switched the identical monitors connection -YES
Did it make a difference -NO...