I have a Dell XPS 13 9350. This issue is brand new to me, but I'm not sure if it's related to any recent software/firmware updates. See the thread here (https://www.dell.com/community/XPS/XPS-13-9350-Black-Screen/td-p/5912336/page/10) for the Dell forums thread.
This issue does not appear to be one with hardware. External displays still work fine, the backlight is on (but the laptop screen is still black). The display works fine when POSTing, and when in the UEFI, and when displaying the windows boot animation.
The Microsoft Basic Display Driver works as well, although this is not a reasonable solution, since this forces everything to use software rendering, which is an awful experience for both battery and cpu on a 3200x1800 pixel display.
Safe mode also works flawlessly, since it forces the use of the Microsoft Basic Display Driver. The issue is also not present in all flavors of Linux I have tried, even though they are using some form of GPU acceleration.
The issue is present in every major version of Windows 10 I have tried, which includes 1703, 1803, and 1809.
Attached is the output of the Intel System Support Utility.
This problem is not specific to Windows 10 or Dell. For the past 2 weeks I have had the exact same issue with my Intel NUC. I have Deleted video drivers, I have installed the latest drivers. Nothing seems to work..... The only way I can get my computer to run is to go into Safe Mode and delete the video drivers and the reboot. Once I log in, it will install the new drivers and then on next reboot to apply drivers it will repeat with the black screen. I have tried also to go back several driver versions and still no fix.. :<