Rtc Battery - HP 321 - Notebook PC Maintenance And Service Manual

RTC battery

The spare part number for the RTC battery is 449137-001.
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
5. Remove the service door (see
6. Remove the hard drive (see
7. Remove the optical drive (see
8. Remove the fan (see
9. Remove the palm rest (see
10. Remove the keyboard (see
11. Remove the top cover (see
12. Remove the system board
Remove the RTC battery:
1. Position the computer right-side up with the front toward you.
2. Release the RTC battery from the socket (1) on the system board and lift the battery (2) up.
98 Chapter 4 Removal and replacement procedures
Battery on page 49).
Service door on page
Hard drive on page
Optical drive on page
Fan on page 60).
Palm rest on page
Keyboard on page
Top cover on page
(seeSystem board on page
49).
52).
58).
64).
69).
73).
92).