Halleluiah, an easy, simple fix!
I struggle to remember the last time I was able to say that.
For several months my Viewsonic VS15153 touch monitor’s touch function has not worked. The lack of touch has not impacted my work so I ignored the problem. Today I finally had time to address the problem. I called Viewsonic tech support, got Rose who suggested switching out the USB cable as it is the controlling factor for the touch capability. Viola the problem was solved. The screen now supports touch again and incidentally lets me flatten it and draw on it. The cable was fine but since the computer end was not connected it could not work. My only excuse is when I replaced a UPS behind the computer I must have pulled the cable out. But…. A SIMPLE FIX!
I did try and find a solution online and in the documentation that I saved to no avail. However Rose solved the problem in less than one minute on the phone so kudos to Viewsonic for hiring ROSE!