We need a lot more details about your PC before being able to offer advice
It does not look like a software issue.
Hard Disk & DVD on Serial SATA or Parallel PATA (=IDE = ATA)) cables ?
(2 devices on one ATA cable needs correct jumper settings on hard disk)
what is boot order in BIOS ?
Do you have an operating system on Hard Disk ?
is this a new build ?
did it ever work ?