Computer reboots when disc is in dvd drive

Hello,
I just recently built my own system about 1 month ago, was working flawlessly. Then one day it wouldnt boot to windows. I inserted the windows disc to do a fresh install thinking windows might be corrupted. I got as far as deleting the partioned disc space windows was on and it rebooted and keeps rebooting with the disc in the dvd player. When I take the disc out it stay at the bios screen for aboutt 3 minutes and reboots again. I cannot get to windows for there is no longer a copy of windows on the drive. I how ever can get into my bios and there is no hard drive detected just the dvd rom. No temps for anything posted in the bios as well as no volts for anything in the bios. It is A SATA HD and all the cable are pluged in properly. My power suppy is working properly as well. Any ideas on what might be wrong or a solution??