In short, a Windows Update (possibly on the latest Windows 10 build - was for me) appears to brick the touchscreen on at least some Surface Pro 4 devices, but since there's relatively few left about and/or they're all out of warranty, Microsoft seem to be able to ignore the problem their updates caused.
In short, a Windows Update (possibly on the latest Windows 10 build - was for me) appears to brick the touchscreen on at least some Surface Pro 4 devices, but since there's relatively few left about and/or they're all out of warranty, Microsoft seem to be able to ignore the problem their updates caused.
https://answers.microsoft.com/en-us/surface/forum/all/surfac...
https://www.reddit.com/r/Surface/comments/oxg0pm/surface_pro...
https://www.reddit.com/r/Surface/comments/otygmo/surface_pro...
https://answers.microsoft.com/en-us/surface/forum/all/surfac...
https://answers.microsoft.com/en-us/surface/forum/all/surfac...
https://www.reddit.com/r/Surface/comments/q8sw6k/comment/hgr...