HP Pro 3405 Micro Maintenance & Service Guide Pro 3400 3405 3410 3500 3505 - Page 132

Preparation for Disassembly, on Access Panel, Memory, Expansion Card, Fan Sink, Processor

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System Board Description System board (includes thermal material) Spare part number 665223-001 The system board is secured to the computer with six screws. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 87). 2. Remove the access panel (Access Panel on page 88). 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 (seeMemory on page 91) ● Expansion cards (Expansion Card on page 96) ● Heat sink (Fan Sink on page 116) ● Processor (Processor on page 118) 4. Remove the fan from the chassis (Fan Assembly on page 114). 5. Rotate the drive cage to its upright position. 6. Rotate the power supply to its full upright position. 7. Disconnect all data and power cables from the system board. 8. Disconnect the balance of the cables from the system board. 122 Chapter 8 Removal and Replacement Procedures - Small Form Factor (SFF) Chassis

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System Board
Description
Spare part number
System board (includes thermal material)
665223-001
The system board is secured to the computer with six screws.
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
87
).
2.
Remove the access panel (
Access Panel
on page
88
).
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 (see
Memory
on page
91
)
●
Expansion cards (
Expansion Card
on page
96
)
●
Heat sink (
Fan Sink
on page
116
)
●
Processor (
Processor
on page
118
)
4.
Remove the fan from the chassis (
Fan Assembly
on page
114
).
5.
Rotate the drive cage to its upright position.
6.
Rotate the power supply to its full upright position.
7.
Disconnect all data and power cables from the system board.
8.
Disconnect the balance of the cables from the system board.
122
Chapter 8
Removal and Replacement Procedures – Small Form Factor (SFF) Chassis