HP ZBook 15u G3 Mobile Workstation HP EliteBook 850 G3 Notebook PC HP EliteBook 840 G3 Notebook PC - Maintenance and Service Guide

Internal base plate
Description Spare part number
Internal base plate for 14” computers 821164-001
Internal base plate for 15” computers 821186-001
Before removing the internal base plate, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 35).
5. Remove the battery (see Battery on page 40).
Remove the internal base plate:
1. On 14” computers, remove 4 Phillips PM2.0x7.0 screws (1) and 6 PM2.5x2.5 screws (2).
– or –
On 15” computers, remove 3 Phillips PM2.0x7.0 screws (1) and 6 PM2.5x5.0 screws (2).
56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts