This guide will show you how to open up the device to remove and replace the disc tray.
Remove the two 10mm screws with a Phillips #1 screwdriver.
Use the plastic prying tool to separate the top plastic casing from the bottom metal casing.
Grip the blue tab and pull upwards to remove the ribbon cable from the motherboard.
Remove the two 7mm screws with a Phillips #1 screwdriver.
Pinch both tabs on the side of the disc tray, push towards the front, and lift the disc tray out to remove.