Just bought a NEC 4571a DVDrw and installed it in my Compaq EVO D51s (P4 2.5, running XP SP2). It was to replace a CD drive.
XP sees drive but I can't read anything in drive, CD or DVD. If I click on the drive or try to explore it, Explorer just open another window showing my computer etc.
Power seems okay, Bios recognised new device as did XP when I first installed it. It's the only device on the cable, the CD was set to Master so I set the DVDrw to master but have also tried Cable select.