Lenovo C240 User Manual page 40

7. Use a small flat head screwdriver to press and push out the pins that secure
the cover to the disk.
8. Separate the cover from the defective optical drive.
9. To install the new optical drive:
a. Align the new optical drive with the cover, and then push the cover back
into position.
b. Slide the new optical drive into the drive bay, then push it into position.
c. Secure the optical drive to the chassis using the screw.
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User Guide