strange

Hey. So.. my laptop Dell Inspiron 15 7559, doing strange things. When I'm using my laptop normally, there is nothing like pixel-rain. But when I'm gaming with a perofrmance-needy game, then after a while of gaming it starts to "rain", and when I quit out of the game, after about 5 mins, it...

Since about two days now I've noticed my screen is acting very strange. At random times it slowly turns all rainbow-ish (mostly pink and green) and very bright, my whole screen being stuck. As soon as I slightly move my laptop the screen pops back to normal and then does the same weird thing a...