odd one but first time its happened for me, mate has an asus x501a
the lcd flickers on and off when lifting and closing the lid but you cant get it open enough to where its at a usable angle , eg 90 degrees to the keyboard
took the frame off and unscrewed from frame moved to just over 90 degrees and screen was still on couldnt try any more due to lack of cable
so im thinking lcd is fine and either a cable is nipped (looked fine) or there is an issue with the screen off switch or mainboard unless im wrong ?
anyone have a service manual for where this switch is (presume it has one) or any other ideas ?