1. Remove any media from the drives and turn off all connected devices and the computer. Disconnect all
power cords from electrical outlets and disconnect all cables from the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 17.
3. Remove the front bezel. See “Replacing the front bezel” on page 18.
4. Pivot the drive bay assembly upward. See “Pivoting the drive bay assembly upward and downward” on
page 19.
5. Disconnect the heat sink and fan assembly cable from the system board.
6. Replace the heat sink and fan assembly.
Figure 98. Removing the heat sink and fan assembly
Figure 99. Installing the heat sink and fan assembly
7. Connect the new heat sink and fan assembly cable to the system board.
8. Reinstall the removed parts. To complete the replacement, see “Completing the parts replacement” on
page 68.
Replacing the power supply assembly
Attention: Do not open your computer or attempt any repairs before reading the Important Product
Information Guide.
Chapter 4. Replacing hardware 59
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