I called Samsung. They had me reload the driver for this particular monitor but to no avail. They suggested some of the things that you suggested and finally said to check the warranty on the monitor. Big help.
I have walked through all of the steps for troubleshooting issues with connecting a Surface Pro to a monitor.
I know the cable works as the Surface Pro recognizes the monitor.
I can't really blame the monitor as I had the same problem with my HP monitor, too.
I have watched all of the YouTube videos on how to connect Surface Pros to monitors but none of that worked either.
I have read that Surface Pro's are known to have issues connecting to monitors. I'm just not tech-savvy enough to figure this out.
At this juncture, I will probably take it in to a computer service shop and see if they can connect it to their monitor and show me what I need to do
If they cannot, I will sell the Surface Pro.
I'm sorry but it really should not be this difficult to connect a computer to a monitor.
Thanks.