Color Distortion on Laptop

[Unsheathed]

First, sorry if this is in the wrong section.
My laptop (Asus G53S) just started acting up. I can only describe it as some color distortion causing dark pixels to go red and in a lot of these areas, the pixels flash between red and black causing a slight but rapid "flash." This only happens a few minutes into when I'm playing Diablo. When I minimize the screen and wait a few more minutes, the screen goes back to normal.
I added a picture of the problem. It was taken off my phone so sorry about quality and whatnot. I tried screenshotting several times when the problem was acting up, but once the screen returned to normal, so did the picture in Paint.
I opened device manager and tried to update my graphics card driver, but it is already up to date says Windows.
Anyone have any thoughts on what's causing this?
Thanks.

Edit: I'd like to add a few things. I haven't played Diablo in a few weeks and my laptop has only been booted up maybe once in the past week or two. I normally run Diablo on max settings, but after this problem started, I tried lowering all graphics to low, but it doesn't help at all.

 

[Okedokey]

Most likely overheating.

I would grab yourself a compressed air spray can and use it to blast any dust out of the fan outputs in the laptop.

Use a program like Speedfan to crank up the fans during gaming.

Uninstall driver, reinstall with latest after using DriverSweeper to remove all remaining files first.

LaptopVideo2Go have the latest drivers made available to laptops for nvidia too.

 

[Unsheathed]

Most likely overheating.

I would grab yourself a compressed air spray can and use it to blast any dust out of the fan outputs in the laptop.

Use a program like Speedfan to crank up the fans during gaming.

Uninstall driver, reinstall with latest after using DriverSweeper to remove all remaining files first.

LaptopVideo2Go have the latest drivers made available to laptops for nvidia too.

Thanks for the response. I also believe it's probably from overheating; but my notebook has always ran hot when gaming. I'll try to blow the dust out soon, but I'd like to add: I noticed that when the problem does occur while gaming, pressing lightly on the top right of the screen in a downward motion solves the problem as long as light pressure is held.

 

[Okedokey]

The flexing of the screen probably just hides the issue.

Crank up the fans, stop using it for gaming until you sort temps or you'll kill it.

 

[Unsheathed]

I managed to avoid the problem for a couple weeks, gaming and whatnot without an issue after bringing temps down a bit.
However, after about a week of non-use, the problem has returned upon boot-up. I can vividly see the "flash" (this one black to green) on the ASUS logo before Windows starts up.
Any recommendations?

 

[i_hate_toms]

install a thermal monitoring application, like MBM5, and check to be sure if it's the overheating or something else.
It could be that the connector cable connecting the LCD panel to the rest of the computer has a loose contact. Does closing the lid and re opening it, and altering the angle between the lid and the keyboard, cause the display to change color representation?
If you have an external monitor, try connecting it to the laptop and check if the same color distortion can be reproduced in the external display.

 

[vedadoSmart]

Yes,the problem was caused by the overheating. But now you have a problem with the soldering of the Video Controller IC or the Video RAM ICs. Take to a repair store. There the fastest solution will be to make a reflow and the put the proper thermal grease or pad.