Compaq Presario CQ42-100 Compaq Presario CQ42 Notebook PC and HP G42 Notebook - Page 89

RTC battery

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RTC battery Description RTC battery Spare part number 602745-001 Before removing the RTC battery, 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 41). 5. Remove the following components: a. Hard drive (see Hard drive on page 42) b. WLAN (see WLAN module on page 47) c. Optical drive (see Optical drive on page 45) d. Keyboard (see Keyboard on page 52) e. Top cover (see Top cover on page 54) f. Speaker assembly (see Speaker assembly on page 57) g. Display assembly (see Display assembly on page 69) h. System board (see System board on page 76) Remove the RTC battery: 1. Turn the system board upside down. 2. Release the RTC battery from the clips on the system board (1). Component replacement procedures 81

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RTC battery
Description
Spare part number
RTC battery
602745-001
Before removing the RTC battery, 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
41
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
42
)
b.
WLAN (see
WLAN module
on page
47
)
c.
Optical drive (see
Optical drive
on page
45
)
d.
Keyboard (see
Keyboard
on page
52
)
e.
Top cover (see
Top cover
on page
54
)
f.
Speaker assembly (see
Speaker assembly
on page
57
)
g.
Display assembly (see
Display assembly
on page
69
)
h.
System board (see
System board
on page
76
)
Remove the RTC battery:
1.
Turn the system board upside down.
2.
Release the RTC battery from the clips on the system board
(1)
.
Component replacement procedures
81