Plss guys can you help? So recently my main fan broke and i went to a computer store to get a new one. So now the fan's working pretty well. I just came back home today, turned on my computer, there was the sound like the cpu sound to tell you it's turned on, and then all of a sudden, it just shuts off. i tried once where i actually logged on and it ran for awhile then suddenly turns off like i just pulled the main cable... what is going onnn ? i need ur helpp plss...