HP ENVY 15-q400 ENVY Notebook Maintenance and Service Guide - Page 60

Heat sink see, Remove the system board

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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 battery (see Battery on page 28), and then remove the following components: a. Service cover (see WLAN module on page 29) b. Hard drive (see Hard drive on page 31) c. Base enclosure (see Base enclosure on page 38) d. Display assembly (see Display assembly on page 41) e. Fan (see Fan on page 50) NOTE: When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board: ● Memory module (see Memory module on page 34) ● Heat sink (see Heat sink on page 55) Remove the system board: 1. Disconnect the following cables from the system board: (1) Connector board cable (2) Connector board ribbon cable (3) Power connector cable (4) Display panel cable (5) Webcam/microphone module cable (6) Wireless antenna cables 52 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts

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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 battery (see
Battery
on page
28
), and then remove the following components:
a.
Service cover (see
WLAN module
on page
29
)
b.
Hard drive (see
Hard drive
on page
31
)
c.
Base enclosure (see
Base enclosure
on page
38
)
d.
Display assembly (see
Display assembly
on page
41
)
e.
Fan (see
Fan
on page
50
)
NOTE:
When replacing the system board, be sure that the following components are removed from the
defective system board and installed on the replacement system board:
●
Memory module (see
Memory module
on page
34
)
●
Heat sink (see
Heat sink
on page
55
)
Remove the system board:
1.
Disconnect the following cables from the system board:
(1)
Connector board cable
(2)
Connector board ribbon cable
(3)
Power connector cable
(4)
Display panel cable
(5)
Webcam/microphone module cable
(6)
Wireless antenna cables
52
Chapter 6
Removal and replacement procedures for Authorized Service Provider parts