HP EliteDesk 800 G3 Maintenance and Service Guide - Page 82

System board

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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: ● Memory modules (Memory on page 25) ● Expansion cards (Expansion cards on page 30) ● Solid-state drive (Removing and installing an M.2 SSD storage card on page 52) ● WLAN module (WLAN module on page 54) ● Heat sink (Fan sink on page 57). ● 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, first 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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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:
●
Memory modules (
Memory
on page
25
)
●
Expansion cards (
Expansion cards
on page
30
)
●
Solid-state drive (
Removing and installing an M.2 SSD storage card
on page
52
)
●
WLAN module (
WLAN module
on page
54
)
●
Heat sink (
Fan sink
on page
57
).
●
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,
first
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