Replacing The System Board - Lenovo ThinkCentre M73z Hardware Maintenance Manual

9. Install the screw to secure the Wi-Fi card to the system board, and then connect the two Wi-Fi antenna
cables to the Wi-Fi card.
Figure 50. Securing the Wi-Fi card and connecting cables
10. Install the system board shield. See "Removing and installing the system board shield" on page 88.
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 118.

Replacing the system board

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Safety information" on page 1.
This section provides instructions on how to replace the system board.
CAUTION:
The heat sink assembly and microprocessor might be very hot. Before you open the computer cover,
turn off the computer and wait several minutes until the computer is cool.
To replace the system board, 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. Place a soft, clean towel or cloth on the desk or other flat surface. Hold the sides of your computer and
gently lay it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer stand. See "Removing and installing the computer stand" on page 73.
4. Remove the computer cover. See "Removing the computer cover" on page 76.
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Chapter 8 Replacing FRUs
111