HP ProBook 4520s Maintenance And Service Manual page 112

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:
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Memory module (see
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WLAN module (see
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WWAN module (see
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Modem module (see
●
Processor (see
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Audio board (see
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:
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
Memory module on page
WLAN module on page
WWAN module on page
Modem module on page
Processor on page
Audio board on page
The 15.6-in computer does not use a separate optical drive connector.
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