Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 114

Figure 20. Installing the primary hard disk drive into bracket
108
Hardware Maintenance Manual
7. Remove the hard disk drive from the blue plastic bracket by flexing the sides
of the bracket enough to slide it free of the hard disk drive.
8. To install the new hard disk drive into the blue bracket, flex the bracket and
align pin 1 , pin 2 , pin 3 , and pin 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.
9. Slide the new hard disk drive into the drive cage until it snaps into position.