HP Pro c640 G2 Chromebook Enterprise Maintenance and Service Guide - Page 47

Touchpad cable ZIF, Keyboard cable ZIF

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Table 5-12 System board descriptions and part numbers (continued) Description Spare part number Intel Pentium G7505 processor, 8 GB of system memory, 64 GB of eMMC memory (models with a fingerprint sensor) M57280-001 Intel Celeron 6305 processor, 8 GB of system memory, 64 GB of eMMC memory (models with a fingerprint M57269-001 sensor) Intel Celeron 6305 processor, 4 GB of system memory, 64 GB of eMMC memory (models without a fingerprint sensor) M57268-001 Before removing the system board, follow these steps: 1. Prepare the computer for disassembly (see Preparation for disassembly on page 26). 2. Remove the bottom cover (see Bottom cover on page 26). 3. Remove the battery (see Battery on page 27). 4. Remove the fan (see Fan on page 32). 5. Remove the heat sink (see Heat sink on page 33). Remove the system board: 1. Disconnect the following cables from the system board: ● Antenna cables from integrated WLAN module (1) ● Camera cable (2) ● Display cable (3) ● USB board cables (ZIF) from USB board (4) ● Keyboard backlight cable (ZIF) (5) (select products only) ● Touchpad cable (ZIF) (6) ● Keyboard cable (ZIF) (7) ● Fingerprint reader cable (ZIF) (8) ● Speaker cable (9) 2. Remove the four Phillips M2.0 × 2.0 screws (1) that secure the system board to the computer. Component replacement procedures 39

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Table 5-12
System board descriptions and part numbers (continued)
Description
Spare part number
Intel Pentium G7505 processor, 8 GB of system memory, 64 GB of eMMC memory (models with a
fingerprint sensor)
M57280-001
Intel Celeron 6305 processor, 8 GB of system memory, 64 GB of eMMC memory (models with a fingerprint
sensor)
M57269-001
Intel Celeron 6305 processor, 4 GB of system memory, 64 GB of eMMC memory (models without a
fingerprint sensor)
M57268-001
Before removing the system board, follow these steps:
1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
26
).
2.
Remove the bottom cover (see
Bottom cover
on page
26
).
3.
Remove the battery (see
Battery
on page
27
).
4.
Remove the fan (see
Fan
on page
32
).
5.
Remove the heat sink (see
Heat sink
on page
33
).
Remove the system board:
1.
Disconnect the following cables from the system board:
●
Antenna cables from integrated WLAN module
(1)
●
Camera cable
(2)
●
Display cable
(3)
●
USB board cables (ZIF) from USB board
(4)
●
Keyboard backlight cable (ZIF)
(5)
(select products only)
●
Touchpad cable (ZIF)
(6)
●
Keyboard cable (ZIF)
(7)
●
Fingerprint reader cable (ZIF)
(8)
●
Speaker cable
(9)
2.
Remove the four Phillips M2.0 × 2.0 screws
(1)
that secure the system board to the computer.
Component replacement procedures
39