I've been following several threads on this and no one has resolved the issue with an update, hard reboot, or OS reset. I've concluded that this is most likely a hardware issue related to a design flaw. Since other folks have plugged in separate monitors
without the issue, it shouldn't be related to the output from the GPU. So that likely rules out heat related failures in the RAM, CPU, and GPU themselves. My bet is that when a component related to video processing heats up, probably the integrated GPU,
it also heats up some nearby component related to the Display or Touch I/O that causes shaking / jittering display errors.
It's a just a guess, but a good one and I find it hard to believe MS engineers haven't figured it out after 2 years and so many people reporting the issue. Which means they most likely know what the problem is, but aren't sharing it. If that's the case
then really actually fixing the problem must be too costly (e.g., refunds, recalls, redesigns) for them to own up so that we're all on our own -- stellar customer service. I'm sure the shareholders are tickled.
Providing this is all true, thank you for the $2,000 lemon and poor service Microsoft. At least my Surface Pen only craps out once or twice per day and my Touch Cover keyboard only needs to be reconnected 3-10 times after scrubbing the contacts to work. I
returned a Surface Pro 3 because of a dozen issues like these, but thought for sure MS had it right with the 4th iteration. I left you 10 years ago and am sorry I gave you another shot.