Laptop Display and Lag Issues

My laptop has been having occasional display issues. The laptop screen will go black but it is still running as there is no disruption in audio. Recently, the laptop screen begins flickering for a few seconds before going black. If I leave it, it sometimes comes back on without any more problems, but sometimes it comes back if I shift the angle of my screen.



The part that really bothers me is recently, I have experienced a great deal of graphics lag when playing video games. What I noticed is that my laptop doesn't seem to heat up as much as it used to when playing games, leading me to believe that either the resources aren't being used properly, or something isn't functioning quite correctly.

Any advice is much appreciated.

Please help.

Thanks!



I didn't find the right solution from the Internet.



References
 forums.anandtech.com/threads/laptop-display-and-lag-issues.2469369/
 
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