Microsoft Surface Laptop 3 owners are reporting that their laptop screens are spontaneously cracking without being dropped, hit, or otherwise used out of the ordinary. Microsoft is investigating the issue but could not give a time frame for resolution. Some owners are told they will need to send the laptop to Microsoft for a screen replacement, which would cost $500. The issue is commonly caused by how the hardware was assembled such as tightening screws too much that it increases the tension throughout the device or not sealing components properly so they are improperly exposed.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-surface-laptop-3-screens-are-spontaneously-cracking/