happened to me also - get to device manager - display adapter - Intel UHD graphics - driver - and click roll back. That worked for me.
Today when waking up my laptop I was met with black bars and the screen jumping around in black and white. When I connect it to an external monitor. It seems to reset everything and the screen goes back to normal. Everything is fine until the screen turns off due to inactivity, and then it does it again. any help? Thanks! [IMAGE][IMAGE]
XPS 17 9710 screen shows black bars and goes black and white