HP 2210b HP Compaq 2210b Notebook PC - Maintenance and Service Guide - Page 66

RTC battery

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RTC battery NOTE: Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. Description RTC battery Spare part number 449137-001 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 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 Keyboard on page 47) d. Switch cover (see Switch cover on page 49) e. Display assembly (see Display assembly on page 51) f. Top cover (see Top cover on page 55) Remove the RTC battery: 1. Disconnect the RTC battery cable (1) from the system board. 58 Chapter 4 Removal and replacement procedures

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RTC battery
NOTE:
Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords
and CMOS settings to be cleared.
Description
Spare part number
RTC battery
449137-001
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
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
Keyboard
on page
47
)
d
.
Switch cover (see
Switch cover
on page
49
)
e
.
Display assembly (see
Display assembly
on page
51
)
f
.
Top cover (see
Top cover
on page
55
)
Remove the RTC battery:
1
.
Disconnect the RTC battery cable
(1)
from the system board.
58
Chapter
4
Removal and replacement procedures