HP EliteBook 820 G2 Notebook PC and HP EliteBook 720 G2 Notebook PC - Maintenance and Service Guide

Heat sink
NOTE: The heat sink spare part kit includes replacement thermal material.
Description Spare part number
Heat sink 730556-001
Before removing the heat sink, follow these steps:
1. Turn o 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 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 37), and then remove the following components:
a. Battery (see Battery on page 39)
b. Hard drive (see Hard drive/solid-state drive on page 41)
c. Keyboard (see Keyboard on page 50)
d. Top cover (see Top cover on page 57)
Remove the heat sink:
1. Turn the top cover upside down with the front toward you.
2. Detach the heat sink shroud (1) from the fan. (The heat sink shroud is attached to the fan with double-
sided adhesive.)
3. Following the 1 through 4 sequence stamped into the heat sink, loosen the four Phillips captive screws
(2) that secure the heat sink to the system board.
72 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts