Rtc Battery - HP Compaq Presario,Presario CQ42-121 Maintenance And Service Manual

RTC battery

Description
RTC battery
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
5. Remove the following components:
a. Hard drive (see
b. WLAN (see
c. Optical drive (see
d. Keyboard (see
e. Top cover (see
f. Speaker assembly (see
g. Display assembly (see
h. System board (see
Remove the RTC battery:
1. Turn the system board upside down.
2. Release the RTC battery from the clips on the system board (1).
86 Chapter 4 Removal and replacement procedures
Battery on page
Hard drive on page
WLAN module on page
Optical drive on page
Keyboard on page 62)
Top cover on page
Speaker assembly on page
Display assembly on page
System board on page
52).
53)
58)
56)
64)
67)
74)
81)
Spare part number
602745-001
ENWW