Instructions
Unplug all cords from the system. Look at the back of the system to see if it has an HDMI port, which is a rectangular port with rounded corners located beside the Ethernet jack. If there is no Ethernet jack, then the system has a Toshiba, Samsung or Hitachi DVD drive. All of these drives use the same firmware.
Plug all cords back into the system if the system has a HDMI port. Turn on the system and eject the disc tray.
Inspect the tray. If the tray has holes and small indents, it is a Hitachi 79FK/L. If it has a smooth surface, the drive is either a BenQ or a LiteOn drive.
Pull the front plate off the system by pressing the button on the right side of the system. This will not void the warranty. Look for a small hole under the silver Xbox 360 plate. You will see a small wire in that hole. A yellow wire means that the Xbox has a LiteOn drive. A white wire means it has a BenQ drive. Snap the front plate back on after you have determined the drive's firmware.