4–56 Maintenance and Service Guide
Removal and replacement procedures
Fan (for models with UMA graphics subsystems)Before removing the fan:
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 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 4-7).
5. Remove the following components:
a. Hard drive (see “Hard drive” on page 4-8)
b. Memory module (see “Memory module” on page 4-10)
c. RTC battery (see “RTC battery” on page 4-12)
d. WLAN module (see “WLAN module” on page 4-14)
e. Optical drive (see “Optical drive” on page 4-20)
f. Keyboard (see “Keyboard” on page 4-21)
g. Keyboard cover (see “Keyboard cover” on page 4-23)
h. Speaker assembly (see “Speaker assembly” on page 4-25)
i. Display assembly (see “Display assembly” on page 4-27)
j. Top cover (see “Top cover” on page 4-35)
k. System board (see “System board” on page 4-48)
Remove the fan:
1. Position the base enclosure with the front toward you.
2. Remove the two black Phillips PM2.5×5.0 screws 1 that secure the fan to the computer.
3. Lift the fan from the base enclosure 2.
Reverse this procedure to install the fan.
Description Spare part number
Fan 486844-001