Unless its some whacked out wonky operating system stuff,
Sounds like Its most likely the VGA ribbon cable that snakes from the mainboard to the lid , via the lid hinge.
What happens on 90% of laptops that do this after a bump( and it dont have to be a big bump )
is the VGA plug unseats from the main board. Never seen it do the opposite yet.
You have to remove the top garnish and keyboard usually to get to this plug. Once I snap them back down, and its working, I use some CA contact cement (just a speck) to seal it in place or it will do it again, and again, and again... If they just did this, and no glue, its happened again.
Most - 80% have the VGA plug facing upwards right above the keyboard.
60% of those , it slightly to the left of center , above keyboard.
So, you can press firmly on the garnish where I speak of, enough to flex the plastic a millimeter, and half of these come back on, although sometimes only if you hold pressure there. ultimately it will have to come apart again.
"The victorious win the battle, then go out to fight ... while the defeated go out to fight, then try to win the battle. -SunTzu
"The only difference between a capitalist and a communist is that the communist hates competition!" -Circuit
