I switched on my laptop and the lights were on, hard drive was spinning but no fan sound and no display at all. The previous night, I was watching a movie on bed without cooling pad and i fell asleep with the charger on. It was on till the morning. I switched it off and went to college. The problem started when I Came back, and turned it on. Could it be that the fan is not working since it was on all night without a cooling pad on bed? Or some other issue. Please help. Thank you