HP EliteBook 840 G9 Maintenance And Service Manual page 81

Backlight ZIF cable (12)
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NFC module ZIF cable (13)
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RTC battery cable (14)
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Fingerprint reader ZIF cable (15)
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9. Remove the following screws that secure the system board and I/O bracket to the computer:
Two Phillips M2.0 × 2.5 broad head screws (1)
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Three Phillips M2.0 × 4.5 screws (2)
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One Phillips M2.0 × 4.4 screw (3)
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Four Phillips M2.0 × 4.5 screws (4)
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10. Remove the system board I/O bracket (5).
The system board I/O bracket is included in the Bracket Kit, spare part number N09030-001.
System board 75