Rtc Battery - HP Compaq Presario,Presario C770 Maintenance And Service Manual

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 (includes double-sided tape)
Before removing the RTC battery, follow these steps:
Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
1.
computer on, and then shut it down through the operating system.
Disconnect all external devices connected to the computer.
2.
Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
3.
then unplugging the AC adapter from the computer.
Remove the battery (see
4.
Remove the following components:
5.
Hard drive (see
a.
Optical drive (see
b.
Keyboard (see
c.
Switch cover (see
d.
Display assembly (see
e.
Top cover (see
f.
System board (see
g.
Remove the RTC battery:
Turn the system board upside down, with the audio connectors toward you.
1.
Disconnect the RTC battery cable (1) from the system board.
2.
Battery on page 40).
Hard drive on page 41)
Optical drive on page
Keyboard on page 50)
Switch cover on page
Display assembly on page
Top cover on page 62)
System board on page
48)
53)
55)
72)
Component replacement procedures
Spare part number
454947-001
75