Lenovo ThinkCentre 9120 Hardware Maintenance Manual page 108

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Hardware Maintenance Manual
4. Remove the hard disk drive cage from the chassis by simply sliding it
outward.
5. Pull on the blue handle 3 to remove hard disk drive from the drive cage.
6. Remove the failing hard disk drive from the blue plastic bracket from by
flexing the sides of the bracket enough to free it from the hard disk drive.
7. To install the new drive into the blue bracket, flex the bracket, and align the
pins 1 through 4 on the bracket with the holes in the hard disk drive. Do
not touch the circuit board 5 on the bottom of the hard disk drive.