HP Probook 450 G9 Maintenance And Service Manual page 67

1. Disconnect the following cables from the system board:
NOTE: You should never disconnect the RTC battery cable from the system board.
Antenna cables from the WLAN module (select products only) (1)
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Power connector cable (2)
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Speaker cable (3)
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Display cable (4)
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USB cable (ZIF) from USB board (5)
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USB cable (ZIF) from system board (6)
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Touchpad cable (ZIF) (7)
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Keyboard backlight cable (ZIF) (select products only) (8)
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Keyboard cable (ZIF) (9)
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Fingerprint reader cable (ZIF) (select products only) (10)
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Important: Do not disconnect the RTC battery cable (11)
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Antenna cables from the WWAN module (select products only) (12)
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2. Remove the port bracket (1) by removing the three Phillips M2.0 × 4.0 screws (2) that secure the bracket
to the system board and then removing the bracket (3).
3. Remove the four Phillips M2.0 × 2.5 screws (4) that secure the system board to the computer.
System board 59