Lenovo ThinkCentre A70 Hardware Maintenance Manual page 127

Figure 60. Removing the two screws that secure the optical drive
7. Lower the drive bay assembly. See "Accessing the system board components and drives" on page 104.
8. Slide the optical drive out of the front of the computer.
Figure 61. Removing the optical drive
9. Slide the new optical drive into the optical drive bay from the front of the computer.
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Chapter 9 Replacing FRUs (Machine Types: 0889, 5023, and 7844.)
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