got 5 surfaces pro 4 at work for our commercials, all 5 units got the same problem , one at 3yo at the rest at 4yo, microsoft have a very poorly hardware design, first they put wifi near usb without isolation, meaning that any usb 3.0 will cutoff wifi at 2,5ghz, so we were forced to update our routers to 5Ghz, then microsoft oficial bases didnt work at all at beginning, lots of problems, solved 2 years ago with countless firmwares updates.
and then to finish microsoft rep, all our tablets have the display problem. since then we banned any microsoft hardware from our office, and we changed for XPS laptops.