Hansol 730E CRT monitor (by 3 users)

I have two vertical black strips at either side of my Hansol 730E CRT monitor. I have used the OSD to stretch the image to fill the horizontal field, but at 100%, there is still an inch and a half of blackness. There are two types of blackness in this strip .Mostly its the type of black when the monitor is not powered, and there is a very small line of power displayed "black", where the monitor is trying to display the color black.

I have reinstalled the monitor drivers and also graphics drivers. I have altered display frequency. I have changed resolutions. None of this worked. I noticed that the monitor displays more horizontal image when booting up, but still not fully from left to right.


Note- the horizontal and vertical controls to stretch do strech the image in the correct way, but the horizontal control is leaving these strips of black when stretched to 100%. The monitor is just over two years old and has seen moderate use.