Lenovo ThinkCentre M800 Hardware Maintenance Manual page 135

To replace the Wi-Fi card, 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 88.
3. If your computer comes with a Wi-Fi card module that supports the Bluetooth function, disconnect
the Bluetooth cable from the Wi-Fi adapter card.
Note: The Bluetooth cable connects the Bluetooth connector on the Wi-Fi adapter card to the front
USB connector on the system board.
4. Rotate the card latch to the open position. Grasp the Wi-Fi adapter card that is currently installed and
gently pull it out of the slot.
Note: The card fits 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.
Figure 78. Removing the Wi-Fi adapter card
5. Disconnect the front and rear Wi-Fi antenna cables from the Wi-Fi card.
Figure 79. Removing the Wi-Fi antenna cables
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Chapter 9 Installing or replacing hardware
127