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10. Lower and position the heat sink fan duct on the top of the heat sink and fan assembly until the two
screw holes in the heat sink fan duct are aligned with those in the heat sink and fan assembly. Install
the two screws to secure the heat sink fan duct.
Figure 37. Installing the heat sink fan duct
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to “Completing the parts replacement” on page 60.
Replacing the microprocessor
Attention: Do not open your computer or attempt any repair before reading and understanding the “Important
safety information” on page v.
This section provides instructions on how to replace the microprocessor.
CAUTION:
The heat sink and microprocessor might be very hot. Turn off the computer and wait three to ve
minutes to let the computer cool before removing the computer cover.
To replace the microprocessor, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 32.
3. Locate the system board and disconnect all cables connected to the system board. See “Locating
parts on the system board” on page 11.
4. Remove the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 46.
Chapter 5. Installing or replacing hardware 53