I'll do you one better and show a picture:
Every now and then this happens. It isn't sudden. It takes a couple of seconds to go from a normal display to... that.
According to Google all signs point to a problem with the display cable, which runs through the left hinge. This is most likely the case as my temporary fix is "rock the screen back and forth until I hit a sweet spot and it goes back to normal."
Reseated the display cable (both in the motherboard and in the LCD panel), but didn't accomplish much. It actually happens more frequently now, but with the ironic bonus of the rocking fix being more effective. Oops!
I don't have a second display to test but I suspect it won't happen there on account of the temporary fix above.
Recent changes: None.
Operating system: Windows 10 Home v1709 build 16299.371
System specs: Lenovo ThinkPad T540p. I got the one with the GeForce GT 730M
I have Googled and read the FAQ: Yes/No
Anyway I'm like 99% confident that the cable itself is busted. I can order a new one from Lenovo for like $20 and replace it myself but I'd like to get a second opinion before I waste my time and money doing that.
|# ? Apr 16, 2018 05:49|
|# ? Apr 25, 2018 02:39|
If you've already reseated the cable and it returns to normal when flexed just right then yeah, most likely the cable is bad.
|# ? Apr 16, 2018 06:27|