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.
Member RevoMaxx is quickly moving up the ranks of Acer Community. He joined us in September and is already making a difference. It's great to see new members like him make a difference only after a few months. Thanks RevoMaxx!