HP Dv4 1540us Service Guide - Page 115

System board, Remove the following components

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System board Description System boards (include thermal material) For use in computer models with Intel processors: ● On models equipped with a 256-MB discrete graphics subsystem ● On models equipped with a 512-MB discrete graphics subsystem ● On models equipped with a UMA graphics subsystem For use in computer models with AMD processors: ● With QuickPlay ● With MediaSmart Spare part number 486723-001 496730-001 486724-001 488238-001 511858-001 NOTE: All system board spare part kits include replacement thermal material. 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 55). 5. Remove the following components: a. Hard drive (see Hard drive on page 59) b. Optical drive (see Optical drive on page 57) c. Keyboard (see Keyboard on page 72) d. Keyboard cover (see Keyboard cover on page 74) e. Display assembly (see Display assembly on page 80) f. Top cover (see Top cover on page 92) Remove the system board: 1. Disconnect the following cables from the system board: ● Modem module cable (1) ● Audio board cable (2) Component replacement procedures 107

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System board
Description
Spare part number
System boards
(include thermal material)
For use in computer models with Intel processors:
●
On models equipped with a 256-MB discrete graphics subsystem
486723-001
●
On models equipped with a 512-MB discrete graphics subsystem
496730-001
●
On models equipped with a UMA graphics subsystem
486724-001
For use in computer models with AMD processors:
●
With QuickPlay
488238-001
●
With MediaSmart
511858-001
NOTE:
All system board spare part kits include replacement thermal material.
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
55
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
59
)
b.
Optical drive (see
Optical drive
on page
57
)
c.
Keyboard (see
Keyboard
on page
72
)
d.
Keyboard cover (see
Keyboard cover
on page
74
)
e.
Display assembly (see
Display assembly
on page
80
)
f.
Top cover (see
Top cover
on page
92
)
Remove the system board:
1.
Disconnect the following cables from the system board:
●
Modem module cable
(1)
●
Audio board cable
(2)
Component replacement procedures
107