Make sure that you have no other storage devices such as external hdd, sd card, etc. Go to the bios by pressing F2 upon switching the machine on, go to boot and make sure that your HDD is set on 1st. If this is the case and the machine still doesnt boot up, you need to get the hard drive changed as it is faulty.
Own a Predator Laptop? Then I bet you have learned a thing or two from beststevie. He has been helping out in this forum for quite a while and it's about time we recognized him for it. Thanks beststevie!