Lenovo Yoga 11e 20DA touch screen not working

[zemlin]

Lenovo Yoga 11e 20DA purchased for cheap on eBay. I bumped the RAM to 8GB and put an SSD in it. It lives in my garage to interface with my 3D printers.
The touch screen worked when I got the machine (about a year ago). At some point it quit working.
There's nothing in the device manager that looks like a touch screen. I downloaded and installed the driver from Lenovo and that didn't make any difference. If it ain't going to touch no more it's not enough of an issue for me to try to repair it. The touch pad works fine - but there are times when a touch screen is useful for my application so if it's just a software thing I'm willing to try to get it back online.

Windows 10 Pro. Any suggestions on something to try here?

[RealBlackStuff]

W7, W8.1 or Linux.