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5. From the outside of the chassis, remove the four Phillips screws that secure the fan to the
chassis, then from the inside of the chassis, slide the fan forward and lift it up and out of the
chassis.
Figure 7-37 Removing the rear fan
To install the rear fan, reverse the removal procedure.
Hood Sensor
1. Prepare the computer for disassembly (Preparation for Disassembly on page 143).
2. Remove the computer access panel (
Computer Access Panel on page 150).
3. Remove the optical drive (
Removing the Existing Optical Drive on page 157).
4. Unplug the hood sensor cable from the white system board connector labeled HSENSE and
remove the cable from the white clip mounted on the inside chassis wall.
5. Slide the hood sensor into the chassis to remove it from its slot.
Figure 7-38 Removing the hood sensor
To install the hood sensor, reverse the removal procedures.
176 Chapter 7 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis