one night i accidently took the ram out while it shutting down. after that the screen is black and i have to hold the power button to turn off. From then when i turn on the computer, i don't hear anything running at all and the screen is dark black then it turn off after 3seconds. I only can see the power light come on during that 3 seconds. it happen ever time....anyone has any suggestion of what happen...i really need this laptop for my school works....thank you so much for reading..