HP (Hewlett-Packard) DV3 ユーザーズマニュアル

Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all

passwords and CMOS settings to be cleared.

RTC battery (includes double-sided tape)

486835-001

Before removing the RTC battery, follow these steps:

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.

Disconnect all external devices connected to the computer.

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.

Remove the battery (see 

Remove the RTC battery:

Turn the computer upside down, and remove the WLAN module cover (see 

Disconnect the RTC battery cable (1) from the system board.

Remove the RTC battery (2).

The RTC battery is attached to the system board with double-sided tape.

Reverse this procedure to install the RTC battery.

Component replacement procedures

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