There's several possibilities here . You may have a corrupted bios , the hard drive failing would not explain the lack of bios. You can remove the hard drive and try to enter the bios.it unlikely the bios is being effected by the hard drive. You may have a bios level virus or the motherboard may be on its way out . Is there a OS on the laptop? A few options are to reset your bios by removing the bios battery if it is so equipped if not do a bios jump off the board, find the bios jump points that reset the bios or just flash the bios to a newer version or reinstall the older one. Hope this helps