screen flashing

Got myself this Gigabyte Aorus 5MB about a year ago, worked fine until December where the screen suddenly starts to flicker and shows some horizontal lines on the upper side of the screen and when this happen, the screen below the lines will freeze and shows some faint overlay images of previous...

screen flashes in all google-related apps/website. initially i only thought its google chrome problem, screen flashing every second, uninstall it. use firefox browsing for answer, use google as search engine, screen flashes again. to confirm its due to "google", i try open google related...