HP RP7 Maintenance & Service Guide HP RP7 Retail System Model 7800 - Page 120

System Board

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System Board Description System board (includes thermal material) Spare part number 674783-001 1. Prepare the computer for disassembly (Preparation for Disassembly on page 46). 2. 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 82) ● Serial port board (USB+PWR 24V and Cash Drawer Port Daughter Card on page 108) ● WLAN (WLAN Module on page 109) ● Processor (Processor on page 99) ● Heat sink (Heat Sink on page 97) ● Processor (Processor on page 99) 3. Remove the rear I/O panel (Rear I/O Panel on page 49). 4. Remove the mounting bracket cover (Mounting Bracket Cover on page 53). 5. Remove the display head back panel (Display Head Back Panel on page 54). 6. Remove the display head from the stand (Removing the Display Head from the Stand on page 90). 7. Remove the rear metal plate (Rear Metal Plate (EMI shield) on page 91). 8. Disconnect all data, power, and any other cables from the system board. 9. Remove the four Torx screws that secure the system board to the computer. 110 Chapter 8 Removal and Replacement Procedures

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System Board
Description
Spare part number
System board (includes thermal material)
674783-001
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
46
).
2.
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
82
)
●
Serial port board (
USB+PWR 24V and Cash Drawer Port Daughter Card
on page
108
)
●
WLAN (
WLAN Module
on page
109
)
●
Processor (
Processor
on page
99
)
●
Heat sink (
Heat Sink
on page
97
)
●
Processor (
Processor
on page
99
)
3.
Remove the rear I/O panel (
Rear I/O Panel
on page
49
).
4.
Remove the mounting bracket cover (
Mounting Bracket Cover
on page
53
).
5.
Remove the display head back panel (
Display Head Back Panel
on page
54
).
6.
Remove the display head from the stand (
Removing the Display Head from the Stand
on page
90
).
7.
Remove the rear metal plate (
Rear Metal Plate (EMI shield)
on page
91
).
8.
Disconnect all data, power, and any other cables from the system board.
9.
Remove the four Torx screws that secure the system board to the computer.
110
Chapter 8
Removal and Replacement Procedures