HP 540 HP 540 Notebook PC and HP 541 Notebook PC - Maintenance and Service Gui - Page 89

ExpressCard assembly

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2. Remove the RTC battery from the socket on the system board. Reverse this procedure to install the RTC battery. ExpressCard assembly NOTE: All system board spare part kits include the ExpressCard assembly. Before removing the ExpressCard assembly, 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 Battery on page 37). 5. Remove the following components: a. Hard drive (see Hard drive on page 38) b. Optical drive (see Optical drive on page 45) c. Keyboard (see Switch cover and keyboard on page 47) d. Switch cover (see Switch cover and keyboard on page 47) e. Speaker (see Speaker on page 51) f. Display lid switch module (see Display lid switch module on page 52) g. Display assembly (see Display assembly on page 53) h. Top cover (see Top cover on page 58) i. System board (see System board on page 66) Component replacement procedures 79

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2.
Remove the RTC battery from the socket on the system board.
Reverse this procedure to install the RTC battery.
ExpressCard assembly
NOTE:
All system board spare part kits include the ExpressCard assembly.
Before removing the ExpressCard assembly, 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
Battery
on page
37
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
38
)
b.
Optical drive (see
Optical drive
on page
45
)
c.
Keyboard (see
Switch cover and keyboard
on page
47
)
d.
Switch cover (see
Switch cover and keyboard
on page
47
)
e.
Speaker (see
Speaker
on page
51
)
f.
Display lid switch module (see
Display lid switch module
on page
52
)
g.
Display assembly (see
Display assembly
on page
53
)
h.
Top cover (see
Top cover
on page
58
)
i.
System board (see
System board
on page
66
)
Component replacement procedures
79