Rtc Battery - HP Compaq 6720t 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:
Shut down the computer. If you are unsure whether the computer is off, turn the computer on, and then
1.
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 keyboard (see
5.
Remove the RTC battery:
Use a non-conductive tool to remove the RTC battery from the socket on the system board.
▲
Reverse this procedure to install the RTC battery.
38 Chapter 4 Removal and replacement procedures
Battery on page 29).
Keyboard on page 35).
Spare part number
449137-001