Are you absolutely sure you weren't seeing ANYTHING when you turned it in before? The POST screen (Power On Self Test) is the first screen you get when you turn on the computer. Depending on the motherboard, it will display a logo, or your computer's specs, etc. Windows and your hard disks have no effect on it.
Was your boyfriend messing with the BIOS? If not, and you are sure you weren't seeing the POST screen, then you can be reasonably sure that there is something wrong in hardware.
Was your boyfriend messing with the BIOS? If not, and you are sure you weren't seeing the POST screen, then you can be reasonably sure that there is something wrong in hardware.