Lenovo Y520, half of the screen turned into pink that is flickering BUT should i be worried??

[everythingsolid]

(THIS PICTURE IS FROM GOOGLE, BUT IT IS SIMILAR TO THIS)
The pink screen appeared after normal usage, i was watching a video, and also played pubg for a while, It started at the bottom of the screen and then goes up to half of the screen, and then it goes down again, after some time it goes up again. But after I rebooted my laptop, The monitor is now fixed. No more pink. SHOULD I BE WORRIED? What could be the problem? and what could be the reason why it appeared but after a restart it is fixed. I dont understand.

[LelouchV · Accepted solution]

If it doesn't appear again, then you're fine, nothing to worry about. The system can go a bit crazy sometimes.

If the issue does come back, open up the back panel and check if the cable is properly seated.

[everythingsolid]

ok i love you, (no homo)