HP EliteBook 755 Maintenance and Service Guide - Page 61

RTC battery, Remove the RTC battery

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RTC battery Description RTC battery Spare part number L17255-001 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 bottom cover (see Bottom cover on page 34). 5. Disconnect the battery cable from the system board (see Battery on page 47). Remove the RTC battery: 1. Disconnect the RTC battery cable from the system board (1). 2. Using a flat tool, pry the battery from the holder (2), and then remove the battery from the computer (3). Reverse this procedure to install the RTC battery. Component replacement procedures 51

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RTC battery
Description
Spare part number
RTC battery
L17255-001
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 bottom cover (see
Bottom cover
on page
34
).
5.
Disconnect the battery cable from the system board (see
Battery
on page
47
).
Remove the RTC battery:
1.
Disconnect the RTC battery cable from the system board
(1)
.
2.
Using a
flat
tool, pry the battery from the holder
(2)
, and then remove the battery from the computer
(3)
.
Reverse this procedure to install the RTC battery.
Component replacement procedures
51