System board
1. Prepare the computer for disassembly (Preparation for disassembly on page 19).
2. Remove the access panel (Access panel on page 20).
3. 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 25)
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Expansion cards (Expansion cards on page 30)
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Solid-state drive (Removing and installing an M.2 SSD storage card on page 52)
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WLAN module (WLAN module on page 54)
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Heat sink (Fan sink on page 57).
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Processor (Processor on page 59)
4. Disconnect all cables connected to the system board, noting their location for reinstallation.
5. Remove the eight Torx T15 screws that secure the system board to the chassis.
6. Lift the board up and out of the computer.
When reinstalling the system board, rst insert the I/O panel back into the slots in the rear of the chassis, and
then align the board with the chassis screw holes.
NOTE: When replacing the system board, you must change the chassis serial number in the BIOS.
72 Chapter 4 Removal and replacement procedures – Microtower (MT) chassis
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