Error code: 0147

I am have a problem with a laptop I have every time I turn it on it goes all the way to the windows screen and then turns off. When I run a diagnosis test it gives me this message:

Error code: 0147

MSG: Error Code 2000-0147

MSG : Optical Drive 0 - self test - - OPU test Falied

I am trying to find out if i need to replace the hard drive or the CD/DVD drive any help with this problem would be greatly appreciated. Thanks again for the help