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PCH heat sink

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PCH heat sink Description PCH heat sink Spare part number 699248-001 IMPORTANT: Make special note of each screw and screw lock size and location during removal and replacement. Before removing the PCH heat sink, follow these steps: 1. Shut down the computer. 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 34). 5. Remove the keyboard (see Keyboard on page 39). 6. Remove the top cover (see Top cover on page 43). 7. Remove the hard drive (see Hard drive on page 47). 8. Remove the USB board (see USB board/Audio jack on page 50). 9. Remove the WLAN (see WLAN module on page 51). 10. Remove the system board (see System board on page 54). Remove the PCH heat sink: 1. Turn the system board upside down, with the front toward you. 2. Remove the two Phillips screws (1) and lift off the PCH heat sink (2). 66 Chapter 4 Removal and replacement procedures

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PCH heat sink
Description
Spare part number
PCH heat sink
699248-001
IMPORTANT:
Make special note of each screw and screw lock size and location during removal
and replacement.
Before removing the PCH heat sink, follow these steps:
1.
Shut down the computer.
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
34
).
5.
Remove the keyboard (see
Keyboard
on page
39
).
6.
Remove the top cover (see
Top cover
on page
43
).
7.
Remove the hard drive (see
Hard drive
on page
47
).
8.
Remove the USB board (see
USB board/Audio jack
on page
50
).
9.
Remove the WLAN (see
WLAN module
on page
51
).
10.
Remove the system board (see
System board
on page
54
).
Remove the PCH heat sink:
1.
Turn the system board upside down, with the front toward you.
2.
Remove the two Phillips screws
(1)
and lift off the PCH heat sink
(2)
.
66
Chapter 4
Removal and replacement procedures