Hi Jeffrey,
Screen flicker/jitter can be due several reasons like display driver issue and app issues. Reinstalling the display drivers is a good way to start troubleshooting the issue. Just to verify, were you able to check if the task manager flickers? You can right-click the Start button in the lower-left corner of your screen and then select Task Manager.
- If Task Manager doesn't flicker, an app is probably causing the problem.
- If Task Manager does flicker, a display driver is probably causing the problem.
Furthermore, we recommend that you run the Surface Diagnostic Toolkit. The SDT resolves common Surface issues. The diagnosis may take 15 minutes or less, but can take an hour or longer and depending on your internet connection speed and on the repairs that the tool needs to do to fix the problems.
Click here to run the Surface Diagnostic Toolkit.
Give us an update, and let us know if you have any additional concerns.
Regards.