System board
Prerequisite
Before you start, read Chapter 2 “Important service information” on page 27 and print the following
instructions.
Avoid contact with hot components inside the computer. During operation, some components become hot
enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and
wait approximately 10 minutes for the components to cool.
The heat-sink-and-fan 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.
Notes:
• Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the
system board. After you replace the system board, the VPD must be updated.
• Your microprocessor sockets and socket covers might look slightly different from the illustrations in this
topic.
• Do not touch the pins on the microprocessor socket or the gold contacts on the microprocessor.
Replacement procedure
1. Remove the hinge cover. See “Hinge cover” on page 57.
2. Remove the computer back cover. See “Computer back cover” on page 58.
3. Remove the system board frame. See “System board frame” on page 62.
4. To get access to the system board, remove the following parts if any:
a. “Memory module” on page 64.
b. “System fan” on page 66.
c. “Heat sink” on page 69.
d. “Wi-Fi card” on page 71.
e. “M.2 SSD” on page 74.
f. “Microprocessor” on page 78.
Chapter 6. Hardware removal and installation 81
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