HP 721953-BA1 사용자 설명서
RTC battery – WWAN models
NOTE:
RTC battery location varies on model with and without WWAN modules.
WWAN models: you must remove the system board to replace the RTC battery.
Non-WWAN models: you must remove only the service cover to replace the RTC battery.
Description
Spare part number
RTC battery for use in models with Intel processors with WWAN
721532-001
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.
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.
then unplugging the AC adapter from the computer.
4.
Remove the battery (see
5.
Remove the following components:
a.
).
b.
)
c.
)
d.
WLAN/Bluetooth module (see
e.
WWAN module (see
f.
Keyboard (see
)
g.
Top cover (see
h.
System board (see
)
Remove the RTC battery:
1.
Position the system board upside-down.
2.
Disconnect the cable from the system board connector (1).
Component replacement procedures
75