I was playing game on my laptop. after that I started watching youtube and few minutes later my laptop suddenly powered off. then I tried to turn on the laptop but it only shows keyboard lights (caps lock, num lock) and nothing appears in the screen. fan's are spinning faster, no beeps coming and it powers off within few moments. good to know, I have upgraded my ram 6 month's ago which was used. what's the problem? is anything wrong with my ram? sorry for my poor English