My laptop is hp pavilion dv6 with 4 gb ram,2.8ghz and ATI radeon hd 4200 series graphics. It came with win7 but i installed win 10 later. The screen often turns off abruptly while playing games and when carrying out heavy load tasks. When it turns off, sound,wifi and harddisk's LED indicator turns red. The cpu fan doesnt shut down when this happens.I have to force turn off my pc and start again to start normally. Please help