First check BIOS press F2, Delete, or Enter at boot should put you into BIOS Check to see if BIOS recognizes your CD/DVD Drives, If not their? update BIOS! Try again, still not their? this could means a bad connection From drivers power source, mother board, an or Drives failing, or had failed, try an external DVD or CD Drive, If this works you most likely fried the CD?DVD Driver, did it go down during a CD or DVD Burn, if so most likely you fried your Optic Drive.