Sony VGN-P688E/Q DVD Drive

2. Locate your Sony VGN-P688E/Q DVD drive that you need to replace. Unplug the clip that feeds sound to the sound card and label it. Next, unscrew the four mounting screws that are in the side of the drive. Then remove the power plug from the rear of the drive and disconnect the drive cable. Take note of which end the red wire connects to. It will be either towards the power connector or away from it.