HP ProBook 4520s HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 70

Thermal shield, and then unplugging the AC adapter from the computer.

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3. Remove the cables from the routing channels and the speakers (3) from the computer. Reverse this procedure to install the speakers. Thermal shield NOTE: The spare part number for the thermal shield is 603700-001. Before removing the thermal shield, 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 Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). NOTE: It is not necessary to disconnect the keyboard cable from the system board before removing the thermal shield. 62 Chapter 4 Removal and replacement procedures

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3.
Remove the cables from the routing channels and the speakers
(3)
from the computer.
Reverse this procedure to install the speakers.
Thermal shield
NOTE:
The spare part number for the thermal shield is 603700-001.
Before removing the thermal shield, 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
Battery
on page
50
).
5.
Remove the switch cover and keyboard (see
Switch cover and keyboard
on page
51
).
NOTE:
It is not necessary to disconnect the keyboard cable from the system board before
removing the thermal shield.
62
Chapter 4
Removal and replacement procedures