I have an XPS 15 for work that suddenly started showing strange visual artifacts on the screen during normal use.
The bottom half of the screen flickers and shows colored lines when moving the mouse across the affected area. I've already tried the Dell monitor test and updating relevant drivers.
Any help would be appreciated, I didn't find much discussion of this exact issue.
Thanks for posting.
Have you tried the system diagnostics test yet? Press F12 at startup and run the complete test. If you are finding any errors, please contact Tech Support in your country for further assistance.