`.. refurbished ..`
Did it come with a warranty? If so you should contact the seller. If it was `refurbished` by the previous owner you should contact him/her.
Did it come with all disks, especially a recovery disk?
It could be anything from bad connections to a failed drive. I think pressing <F2> on start should get you into the BIOS which would let you see if the drive is recognised. If you can`t get into BIOS it may be a major fault.