HP 321 - Notebook PC Maintenance And Service Manual page 60

Before removing the service door 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
Remove the service door on a 39.6-cm (15.6-in) computer:
1. Remove four Phillips PM2.0×3.0 screws (1) that secure the service door to the computer.
2. Slide the service door (2) away from the computer.
Remove the service door on a 35.6-cm (14-in) or 33.8-cm (13.3-in) computer:
1. Remove two Phillips PM2.0×3.0 screws (1) that secure the service door to the computer.
50 Chapter 4 Removal and replacement procedures
Battery on page 49).