HP (Hewlett-Packard) 541 Laptop User Manual


 
System board
NOTE: All system board spare part kits include the ExpressCard assembly.
NOTE: All system board spare part kits include replacement thermal material. Replacement thermal
material is also available in the Thermal Material Kit, spare part numbers 456605-001 and 456606-001.
Description Spare part number
For use only with computer models equipped with Intel Core2 Duo processors and UMA graphics
subsystem
495410-001
For use only with computer models equipped with Intel Celeron M processors and UMA graphics
subsystem
495395-001
For use only with computer models equipped with discrete graphics subsystem 509115-001
For use only with computer models equipped with discrete graphics subsystem 509116-001
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 37).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 38)
b. Optical drive (see
Optical drive on page 45)
c. Keyboard (see
Switch cover and keyboard on page 47)
d. Switch cover (see
Switch cover and keyboard on page 47)
e. Speaker (see
Speaker on page 51)
f. Display lid switch module (see
Display lid switch module on page 52)
g. Display assembly (see
Display assembly on page 53)
h. Top cover (see
Top cover on page 58)
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 module (see
Memory module on page 43)
WLAN module (see
WLAN module on page 40)
Processor (see
Processor on page 74)
66 Chapter 4 Removal and replacement procedures