HP (Hewlett-Packard) LJ541UT#ABA ユーザーズマニュアル

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Fingerprint reader board
Description
Spare part number
Fingerprint reader board (includes cable)
642764-001
Before removing the fingerprint reader board, follow these steps:
1.
Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2.
Disconnect all external devices connected to the computer.
3.
Disconnect the power from the computer by first unplugging the power cord from the AC outlet,
and then unplugging the AC adapter from the computer.
4.
Remove the battery (see 
5.
Remove the following components:
a.
Bottom door (see 
b.
Hard drive (see 
)
c.
Optical drive (see 
)
d.
WLAN module (see 
e.
WWAN module (see 
f.
Fan (see 
)
g.
Heat sink (see 
)
h.
Keyboard (see 
)
i.
Bottom cover (see 
Remove the fingerprint reader board:
1.
Position the computer upside-down with the front toward you.
102 Chapter 4   Removal and replacement procedures