HP Z4 Maintenance and Service Guide - Page 38

System board

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System board NOTE: The system board spare part kit includes replacement thermal material. Follow these steps to remove the system board: 1. Prepare the computer for disassembly (see Preparation for disassembly on page 16), and then remove the following components: a. Access panel (see Access panel on page 20) b. Memory fan (see Memory fan on page 24) c. Rear fan (see Rear fan on page 26) NOTE: When replacing the system board, be sure that the heat sink (see Heat sink on page 27) is removed from the defective system board and installed on the replacement system board. 2. Disconnect the following cables from the system board: (1) Power supply P2 cable (2) Front audio cable (3) Thermal cable (4) Power supply P1 cable (5) FUI cable (6) USB cable (7) OCUlink cable (used on FIOUI Premium models) (8) Drive SATA cables (up to 6 locations) (9) Front card guide and fan cable 3. Remove the nine Torx15 M3.0×6.0 screws (1) that secure the system board to the computer. 30 Chapter 4 Removal and replacement procedures

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System board
NOTE:
The system board spare part kit includes replacement thermal material.
Follow these steps to remove the system board:
1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
16
), and then remove
the following components:
a.
Access panel (see
Access panel
on page
20
)
b.
Memory fan (see
Memory fan
on page
24
)
c.
Rear fan (see
Rear fan
on page
26
)
NOTE:
When replacing the system board, be sure that the heat sink (see
Heat sink
on page
27
) is
removed from the defective system board and installed on the replacement system board.
2.
Disconnect the following cables from the system board:
(1)
Power supply P2 cable
(2)
Front audio cable
(3)
Thermal cable
(4)
Power supply P1 cable
(5)
FUI cable
(6)
USB cable
(7)
OCUlink cable (used on FIOUI Premium models)
(8)
Drive SATA cables (up to 6 locations)
(9)
Front card guide and fan cable
3.
Remove the nine Torx15 M3.0×6.0 screws
(1)
that secure the system board to the computer.
30
Chapter 4
Removal and replacement procedures