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10. Connect the new system fan assembly cable to the system fan connector on the system board. See
“Locating parts on the system board” on page 11.
11. Reinstall the heat sink fan duct. See “Replacing the heat sink and fan assembly” on page 47.
12. Reinstall the hard disk drive. See “Replacing the hard disk drive” on page 41.
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 70.
Replacing the WiFi units
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 WiFi units. The WiFi units include a WiFi adapter
card, a WiFi card module, and a rear WiFi antenna cable.
Replacing the WiFi units involves the following operations:
• “Removing the WiFi adapter card” on page 60
• “Removing the WiFi card module” on page 61
• “Installing the WiFi units” on page 62
Removing the WiFi adapter card
To remove the WiFi adapter card, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 32.
3. Remove the screw that secures the WiFi adapter card.
4. Grasp the WiFi adapter card that is currently installed and gently pull it out of the slot.
Figure 45. Removing the WiFi adapter card
Note: The card ts tightly into the card slot. If necessary, alternate moving each side of the card a
small amount until it is removed from the card slot.
60 ThinkCentre User Guide