HP ProBook 4520s HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 112

When replacing the system board, be sure that the following components are removed from

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When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board: ● Memory module (see Memory module on page 55) ● WLAN module (see WLAN module on page 65) ● WWAN module (see WWAN module on page 68) ● Modem module (see Modem module on page 99) ● Processor (see Processor on page 74) ● Audio board (see Audio board on page 101) Remove the system board: 1. Position the computer right-side up with the front toward you. 2. Remove the M2.0x3.0 screw on the left of the system board (1). 3. If this is a 17.3-in computer, remove the single M2.0 x 3.0 screw (2) that secures the optical drive connector to the base. NOTE: The 15.6-in computer does not use a separate optical drive connector. 4. Lift the board at an angle (3) and remove the optical drive extender (4). 5. Slide the board partially out of the base pan (5). 104 Chapter 4 Removal and replacement procedures

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When replacing the system board, be sure that the following components are removed from the
defective system board and installed on the replacement system board:
●
Memory module (see
Memory module
on page
55
)
●
WLAN module (see
WLAN module
on page
65
)
●
WWAN module (see
WWAN module
on page
68
)
●
Modem module (see
Modem module
on page
99
)
●
Processor (see
Processor
on page
74
)
●
Audio board (see
Audio board
on page
101
)
Remove the system board:
1.
Position the computer right-side up with the front toward you.
2.
Remove the M2.0x3.0 screw on the left of the system board
(1)
.
3.
If this is a 17.3-in computer, remove the single M2.0 x 3.0 screw
(2)
that secures the optical drive
connector to the base.
NOTE:
The 15.6-in computer does not use a separate optical drive connector.
4.
Lift the board at an angle
(3)
and remove the optical drive extender
(4)
.
5.
Slide the board partially out of the base pan
(5)
.
104
Chapter 4
Removal and replacement procedures