Acer Aspire 9300 does not boot up

I was using my laptop when the screen went blank, and then the battery went dead so I put it on charge and pressed the power button. The LED for the power button came on but nothing was happening, no sound from the laptop or anything, except for when you put a disc in the disc drive then the drive makes a sound like it is reading the disc. I have tried several things such as leaving it off for over one hour and leaving it on for over one hour. I even tried connecting it to a monitor in case the screen had broke but that didn't work. The screen remains completely blank as if the laptop hadn't even been turned on. I need it sorted out quick as I have lots of coursework to do and I don't want to have to format the hard drive either.