Does anyone know if it's a video card problem or something else. I switched my video card to nvidia 770m, but when I restarted the laptop the screen turned red and and it flickers. I tried everything from reinstalling the drivers and did diagnosis on the video card and it passed. The weird part is when I switched to the discreet graphics card it's not only in Windows but everything like in the Bios and start up. I connected my laptop to my TV by HDMI and the screen is fine, but the laptop screen is distorted red. I don't know if explained myself.