Dell OptiPlex 745 - Manual (Page 132)

15. Install your operating system on the hard drive.
For instructions, see the documentation that came with your operating system.
Replacing a Hard-Drive Fan (Only Required for Certain Configurations)
1. Follow the instructions in Before You Begin .
2. Remove the hard drive (see Removing a Hard Drive ).
3. Turn the hard drive upside down, so that the hard-drive fan is visible in the bottom of the drive bracket.
4. To remove the hard-drive fan:
a. Unplug the fan.
b. Lift the release tab on the back panel of the fan.
c. Rotate the fan in the opposite direction from that indicated by the arrow on the back panel of the fan.
d. Lift to remove the fan and its back panel from the hard-drive bracket.
5. To replace the hard-drive fan:
a. Align the two pegs and the tab on the fan's back panel with the two corresponding peg holes and the slot in the fan itself and press the fan and
its back panel together
b. Turn the fan upside-down, so that its backing faces up and align the triangle on the fan's back panel with the corresponding triangle on the back
of the hard-drive bracket.
c. Rotate the fan and its backing in the direction of the arrow on the fan's back panel.
Optical Drive
Removing an Optical Drive
1. Follow the procedures in Before You Begin .
1 fan release tab
2 fan with fan back panel
3 power cable
4 hard-drive bracket
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the computer cover.