Dell OptiPlex 755 User Manual page 240

11. Replace the computer cover (see
12. Replace the cable cover, if used.
See the documentation that came with the drive for instructions on installing any software required for drive operation.
13. Reboot the computer.
14. Partition and logically format your drive before you proceed to the next step.
For instructions, see the documentation that came with your operating system.
15. Test the hard drive by running the Dell Diagnostics (see
16. Install your operating system on the hard drive.
For instructions, see the documentation that came with your operating system.
Replacing a Hard Drive Fan
1. Follow the instructions in Before You
2. Remove the hard drive (see
3. Remove the hard drive fan:
a. Remove the screw that secures the fan release tab to the hard drive bracket.
b. Press down on the fan release tab, and then slide the fan towards the front of the computer so that its side tabs are free of the corresponding
slots in the hard drive bracket.
c. Lift to remove the fan from the hard drive bracket.
d. Unplug the fan.
Replacing the Computer Cover).
Dell Diagnostics).
Begin.
Hard Drive).