HP V3801XX, V3523TU, V3930TU, V3931TU, V3929TU, V3928TU, V3925TU, V3923TU, V3922TU, V3921TU RTC battery

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 (includes 2-sided tape)	417076-001

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 battery (see Battery on page 53).

5. Remove the hard drive cover (see Hard drive on page 54).

Remove the RTC battery:

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

2. Remove the RTC battery (2).

Reverse this procedure to install the RTC battery.

Component replacement procedures 61