I seem to be having power problems with my TDK (rebadged Lite-On) 48x burner. I have to flip the switch in the back several times back and forth before it will turn on, and then in the middle of an extraction it will simply shut off. Everything is plugged in fine so I don't know whats causing it. Also, when I burn with it, on about half the burns it will stop and give me an error saying "power calibration error". Does anyone know whats going on?