Eject the media drawer on the component. Press the two tabs on the front edge of the drawer to release and lift off the faceplate before retracting the media drawer.
Unplug the device from the electrical outlet and turn it upside down.
Use a screwdriver to remove the screws holding the cabinet to the frame of the component. Screws may be on the sides of the cabinet as well as the bottom. depending on the type of component. Slide off the cabinet or cover.
Unplug the DVD or CD drive's ribbon cable from the socket inside the component.
Take out the screws holding the bottom plate of the DVD or CD drive, as well as the mounting screws holding the drive in position inside the component. Remove the drive and place on a flat surface.
Lift off the bottom plate to expose the drawer and grooved wheel holding the belt. Stretch the belt gently to remove it from the wheel. If the belt is broken, simply pull it off.
Slip the new belt in position and seat it evenly in the grooved wheel underneath the drawer. Replace the bottom plate and attach with screws.
Insert the drive in the component and secure it with screws. Stretch the belt gently over the wheel on the motor shaft inside the component. Pull the belt to test that it rotates smoothly.
Plug in the ribbon cable to its socket.
Replace the component cabinet or cover with the screws and turn it right side up.
Plug in the power cord and eject the media drawer.
Snap the faceplate in place on the front edge of the drawer and close the drawer.