HP 6535b HP Compaq 6530b Notebook PC and HP Compaq 6535b Notebook PC - Mainten - 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 48). 5. Remove the hard drive (see Hard drive on page 54). Remove the RTC battery: Remove the RTC battery from the socket on the system board. Reverse this procedure to install the RTC battery. When installing the RTC battery, make sure the "+" sign faces up. 56 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
48
).
5.
Remove the hard drive (see
Hard drive
on page
54
).
Remove the RTC battery:
Remove the RTC battery from the socket on the system board.
Reverse this procedure to install the RTC battery. When installing the RTC battery, make sure the “+”
sign faces up.
56
Chapter 4
Removal and replacement procedures