HP 8710w - HP Mobile Workstation, Maintenance And Service Manual, Page: 69 / 175

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 450478-001
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 46 ).
5. Remove the memory module/WLAN module compartment cover (see Primary memory module
on page 54 ).
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
2. Remove the RTC battery (2) from the clip built into the base enclosure.
Reverse this procedure to install the RTC battery.
Component replacement procedures 59