hi i need help!! i have an Acer m5640 and windows vista premium home won't boot it turns on y can see the fan working, i unplugged the power turn it off and then hold the power bottom a few minutes turned it back on but i did not work then i did the same but this time i took the ram out for a few seconds and it did not work.Any Help Would Be Appreciated thanks! i Apologize for my English :)