https://arstechnica.com/gadgets/2018/05/microsoft-to-replace-flickering-surface-pro-4s-for-free/ >Microsoft will replace Surface Pro 4s that are afflicted with a screen flickering issue that is caused by a hardware problem and is unfixable in firmware or software. >For more than a year, there have been complaints from Surface Pro 4 users that their tablet computers were developing a nasty screen flickering issue. You can see the issue in action here. The random occurrence and nature of the corruption made it clear that the hardware was the cause. To try and eke some life out of their systems, Surface Pro 4 users were going to extreme lengths. Sticking the machines in the freezer would restore normal function for a short period, and other owners felt that hairdryers were a better solution.