System board
The system board is secured with three screws.
To remove the system board:
1. Prepare the computer for disassembly (see Preparing to disassemble the computer on page 21).
2. Remove the stand (see Stand on page 21).
3. Remove the rear port cover (see Rear port cover on page 23).
4. Remove the fan (see Fan assembly on page 35).
5. Remove the heat sink (see Heat sink on page 36).
6. When replacing the system board, make sure the following components are removed from the defective
system board and installed on the replacement system board:
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Memory modules (Memory on page 29)
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M.2 solid-state drive (M.2 solid-state drive on page 28)
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WLAN module (WLAN module on page 32)
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Processor (Processor on page 38)
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Option board (Option board on page 33)
7. Disconnect all cables from the system board, noting their location for reinstallation.
NOTE: If replacing the system board, you do not need to disconnect the RTC battery, as replacement
boards come with a battery already connected.
8. Remove the three screws (1) that secure the system board to the computer.
9. Lift the right side of the system board up slightly (2).
10. Pull the system board to the right to disengage the ports from the chassis (3), and then lift the system
board up and out of the computer (4).
To install the system board, reverse the removal procedures.
Replace the thermal pad below the system board.
System board 39
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