Rtc Battery - HP Compaq 8510p - Compaq Business Notebook 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
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 memory module (see
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 top cover.
Reverse this procedure to install the RTC battery.
74 Chapter 4 Removal and replacement procedures
Battery on page 45).
Memory module on page
Spare part number
449137-001
55).