What’s wrong with my power?

You’ve upgraded the power supply of a computer a week ahead of a video card and hard drive upgrade. However, when the computer is powered on, all of the components are functional except for the DVD-RW drive. Prior to the installation, you checked the voltage at the wall outlet and the voltages coming from each output from the power supply. What is the most likely cause of this faulty DVD-RW drive?

What’s wrong with my power?