HP Desktop Pro A G2 Maintenance and Service Guide - Page 51

System board, that secure the system board to the chassis.

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System board 1. Prepare the computer for disassembly (Preparation for disassembly on page 16). 2. Remove the access panel (Access panel on page 17). 3. Remove the front bezel (Front bezel on page 23). 4. If installed, remove the optical drive (Removing the optical drive on page 25) 5. Remove the drive cage (Removing the drive cage on page 28) 6. Remove the fan duct (Fan duct on page 36) 7. 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 33) ● Expansion cards (Expansion cards on page 20) ● Fan sink (Fan sink on page 37). ● Processor (Processor on page 39) ● WLAN module (WLAN module on page 19) 8. Disconnect the all cables from the system board. 9. Remove the nine Torx T15 screws (1) that secure the system board to the chassis. 10. Slide the system board toward the front of the computer to disengage the rear connectors from the chassis (2). 11. Lift the rear of the board (3), and then pull board toward the rear and up and out of the computer (4). When reinstalling the system board, insert the front of the system board into the front chassis slot, lower the board down into the base pan, and then slide the system board back into the rear I/O ports. Do not attempt to install the board straight down into the chassis. System board 43

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System board
1.
Prepare the computer for disassembly (
Preparation for disassembly
on page
16
).
2.
Remove the access panel (
Access panel
on page
17
).
3.
Remove the front bezel (
Front bezel
on page
23
).
4.
If installed, remove the optical drive (
Removing the optical drive
on page
25
)
5.
Remove the drive cage (
Removing the drive cage
on page
28
)
6.
Remove the fan duct (
Fan duct
on page
36
)
7.
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
33
)
●
Expansion cards (
Expansion cards
on page
20
)
●
Fan sink (
Fan sink
on page
37
).
●
Processor (
Processor
on page
39
)
●
WLAN module (
WLAN module
on page
19
)
8.
Disconnect the all cables from the system board.
9.
Remove the nine Torx T15 screws
(1)
that secure the system board to the chassis.
10.
Slide the system board toward the front of the computer to disengage the rear connectors from the
chassis
(2)
.
11.
Lift the rear of the board
(3)
, and then pull board toward the rear and up and out of the computer
(4)
.
When reinstalling the system board, insert the front of the system board into the front chassis slot, lower the
board down into the base pan, and then slide the system board back into the rear I/O ports. Do not attempt to
install the board straight down into the chassis.
System board
43