HP Pavilion DV7-4280 Maintenance And Service Manual page 94

Description
With ATI Mobility Radeon HD 5470 discrete graphics subsystem and 512-MB of dedicated
memory (Dual Core)
With Intel HM55 HD UMA graphics subsystem and shared memory and v.1.1 subwoofer
With Intel HM55 HD UMA graphics subsystem and shared memory and v.1.0 subwoofer
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
5. Remove the primary hard drive cover (see
6. Remove the following components:
a. Hard drive (see
b. Remove the secondary hard drive (see
c. Optical drive (see
d. Keyboard (see
e. Top cover (see
f. Display assembly (see
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:
●
RTC battery (see
●
Memory module (see
●
WLAN module (see
●
Fan/heat sink assembly (see
●
Processor (see
84 Chapter 4 Removal and replacement procedures
Battery on page
Hard drive on page
Optical drive on page
Keyboard on page
Top cover on page
Display assembly on page
RTC battery on page
Memory module on page
WLAN module on page
Fan/heat sink assembly on page
Processor on page 98)
51).
Primary hard drive cover on page
53).
Secondary hard drive on page
63)
65)
67)
73)
61)
62)
58)
Spare part number
605319-001
615311-001
605322-001
52).
55).
94)