Replacing The Coin-Cell Battery - Lenovo ThinkCentre M900z 10F2 Hardware Maintenance Manual

6. Loosen the screw that secures the Wi-Fi card, and then remove the Wi-Fi card shield from the chassis.
Disconnect the Wi-Fi antenna cables from the Wi-Fi card.
Note: The screw cannot be removed from the Wi-Fi card shield.
Figure 43. Removing the Wi-Fi card shield and disconnecting the Wi-Fi antenna cables
7. Pull the Wi-Fi card out of the M.2 Wi-Fi card slot.
Figure 44. Removing the Wi-Fi card
8. Insert the new Wi-Fi card into the M.2 Wi-Fi card slot. See "Parts on the system board" on page 35.
Then, pivot the Wi-Fi card downward so that the screw notch on the Wi-Fi card is aligned with the
screw hole in the mounting stud.
Note: Do not touch the notched edge of the Wi-Fi card.
9. Connect the Wi-Fi antenna cables to the Wi-Fi card.
10. Align the screw on the Wi-Fi card shield with the mounting stud, and then tighten the screw to secure
the Wi-Fi card.
11. Reinstall the system board shield. See "Replacing the system board shield" on page 98.
12. Reinstall the computer cover. See "Replacing the computer cover" on page 95.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 116.

Replacing the coin-cell battery

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Read this first: Important safety information" on page 1.
Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel-connector assignments (configuration). A coin-cell battery keeps this information active
when you turn off the computer.
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ThinkCentre M900z Hardware Maintenance Manual