Laptop screen flicker and dim

my laptops screen flickers (very lightly, barely noticeable) every once in a blue moon, and it also seems oddly dim compared to how i remember it being, whites appear slightly grey etc etc, my laptops brightness setting are up max.

Laptop: Hp pavillion g6 (dont know model number, it's the i5 version with 750gb of storage and 15 inch screen)


mine does that aswell, i think it might of been something to do with when i cracked it open to fix it, i might have not plugged something back in corectly.

ive dropped mine quite a few times, im surprised my hard drive hasnt broken yet.