It looks like the Microsoft Surface 4 Pro has a bit of an issue after an update that was applied in July users have been reporting display issues. It seems that the problem is so far fetched that Microsoft now physically is replacing the units.
The big problem is that after the update, the touch screen has stopped working, Reinstalling Windows does not solve the issue and updating to new firmware versions neither. Microsoft's customer service mentions it actually has to do with the size of the old firmware version versus the new one, which is overwritten and causes a failure.
Multiple users now report that Microsoft is swapping out the effected Surface Pro 4's for a new one, even if the warranty period had already expired.
Microsoft Replacing Surface 4 Pro models that have screen issues after update