HP ProBook 4520s HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 111

System board, Remove the speakers see

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System board NOTE: The system board spare part kit includes replacement thermal material. Description Spare part number System board with UMA graphics and RTC battery 598667-001 System board with UMA graphics, WWAN capability, and RTC battery 598669-001 System board with discrete graphics and RTC battery 598668-001 System board with discrete graphics, WWAN capability, and RTC battery 598670-001 System board with UMA graphics and RTC battery for use only in the People's Republic of China and Russia 605168-001 System board with UMA graphics, WWAN capability, and RTC battery for use only in the People's 605170-001 Republic of China and Russia System board with discrete graphics and RTC battery for use only in the People's Republic of China 605169-001 and Russia System board with discrete graphics, WWAN capability, and RTC battery for use only in the People's Republic of China and Russia 605171-001 Before removing the system board, 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). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power button board on page 58). 8. Remove the speakers (see Speakers on page 60). 9. Remove the thermal shield (see Thermal shield on page 62). 10. Remove the display assembly (see Display assembly on computers with 17.3-in displays on page 80 or Display assembly on computers with 15.6-in displays on page 86). 11. Remove the palm rest (see Palm rest on page 76). 12. Remove the hard drive (see Hard drive on page 78). 13. Remove the top cover (see Top cover on page 92). Component replacement procedures 103

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System board
NOTE:
The system board spare part kit includes replacement thermal material.
Description
Spare part number
System board with UMA graphics and RTC battery
598667-001
System board with UMA graphics, WWAN capability, and RTC battery
598669-001
System board with discrete graphics and RTC battery
598668-001
System board with discrete graphics, WWAN capability, and RTC battery
598670-001
System board with UMA graphics and RTC battery for use only in the People's Republic of China
and Russia
605168-001
System board with UMA graphics, WWAN capability, and RTC battery for use only in the People's
Republic of China and Russia
605170-001
System board with discrete graphics and RTC battery for use only in the People's Republic of China
and Russia
605169-001
System board with discrete graphics, WWAN capability, and RTC battery for use only in the
People's Republic of China and Russia
605171-001
Before removing the system board, 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
).
6.
Remove the optical drive (see
Optical drive
on page
56
).
7.
Remove the power button board cable (see
Power button board
on page
58
).
8.
Remove the speakers (see
Speakers
on page
60
).
9.
Remove the thermal shield (see
Thermal shield
on page
62
).
10.
Remove the display assembly (see
Display assembly on computers with 17.3-in displays
on page
80
or
Display assembly on computers with 15.6-in displays
on page
86
).
11.
Remove the palm rest (see
Palm rest
on page
76
).
12.
Remove the hard drive (see
Hard drive
on page
78
).
13.
Remove the top cover (see
Top cover
on page
92
).
Component replacement procedures
103