Compaq 6720t HP Compaq 6720t Mobile Thin Cleint PC - Maintenance and Service G - Page 46

RTC battery, Remove the battery see

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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, 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 29). 5. Remove the keyboard (see Keyboard on page 35). 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

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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, 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
29
).
5
.
Remove the keyboard (see
Keyboard
on page
35
).
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