HP EliteBook 820 G1, HP EliteBook 725 G2, & EliteBook 720 G1 Notebook PCs - Maintenance and Service Guide

6 Removal and replacement procedures for
Authorized Service Provider parts
CAUTION: Components described in this chapter should only be accessed by an authorized service provider.
Accessing these parts can damage the computer or void the warranty.
NOTE: HP continually improves and changes product parts. For complete and current information on
supported parts for your computer, go to
http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
Component replacement procedures
NOTE: Details about your computer, including model, serial number, product key, and length of warranty,
are on the service tag at the bottom of your computer. See
Locating the serial number, product number, and
model number on page 21 for details.
This chapter provides removal and replacement procedures for Authorized Service Provider only parts.
There are as many as 54 screws that must be removed, replaced, and/or loosened when servicing the
computer. Make special note of each screw size and location during removal and replacement.
RTC battery
Description Spare part number
RTC battery (includes cable and double-sided adhesive) 702853-001
Before removing the RTC battery, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the service cover (see
Service cover on page 67).
5. Remove the battery (see
Battery on page 69).
6. Remove the keyboard (see
Keyboard on page 81).
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
88 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts