System board
NOTE: The system board spare part kit includes UMA or discrete graphics subsystem memory and
replacement thermal material.
Description Spare part number
HD UMA system board with card reader 605903-001
HD 5470/512 MB discrete system board with card reader 605902-001
HD 5470/1 GB discrete system board with card reader 608340-001
HD 5470/ 512 MB discrete system board with card reader (for model 1.1 only) 615381-001
HD 5470/1 GB discrete system board with card reader (for model 1.1 only) 615382-001
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 modules (see
Memory module on page 50)
●
WLAN module (see
WLAN module on page 47)
●
Modem module (see
Modem module on page 63)
Before removing the system board:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn on
the computer, 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 disconnecting the power cord from the AC
outlet and then disconnecting the AC adapter from the computer.
4. Remove the battery (see
Battery on page 41).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 42)
b. Optical drive (see
Optical drive on page 45)
c. WLAN module (see
WLAN module on page 47)
d. Memory module (see
Memory module on page 50)
e. Keyboard (see
Keyboard on page 53)
f. Top cover (see
Top cover on page 56)
g. Modem module (see
Modem module on page 63)
h. Display assembly (see
Display assembly on page 68)
74 Chapter 4 Removal and replacement procedures
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