Hey Guys,
my probook 4520s powers up as before, but the screen remains blank(black). Every now and then, maybe once out of 20 shots, it powers up and there are thick vertical stripes on the screen and I can see windows booting up, but after a short while the laptop shuts down. If it doesn't turn off, the screen remains blank. There were no updates, upgrades or any tinkering what so ever. It just started to show these symptoms. Have you any idea what went wrong and have you any suggestions how to fix this? See enclosed pics of the rare occasion when the screen is not blank.
