The fact you can't even get into BIOS would be setting alarm bells ringing for me.
What I would do, is disconnect the HD and see if that lets you into BIOS. I've had problems before where an incorrectly connected HD cable prevented me from booting. Check the connection to both the drive and the motherboard controller.
What I would do, is disconnect the HD and see if that lets you into BIOS. I've had problems before where an incorrectly connected HD cable prevented me from booting. Check the connection to both the drive and the motherboard controller.