Maintenance and Service Guide

Air flow channel
Description Spare part number
Air flow channel 728052-001
Before removing the air flow channel, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see
Bottom cover on page 23).
5. Remove the rear cover (see
Rear cover on page 26).
6. Disconnect the battery cable (see
Hard drive on page 27).
7. Remove the hard drive (see
Hard drive on page 27).
8. Remove the cover bracket (see
X-axis capacitor board on page 33).
9. Remove the display stand recess (see
Display stand recess on page 41).
Remove the air flow channel:
1. Detach the mylar shroud (1) that connects the air flow channel to the fan.
2. Remove the Phillips PM3.0×6.5 screw (2) that secures the air flow channel to the middle frame.
3. Remove the air flow channel (3).
Reverse this procedure to install the air flow channel.
Component replacement procedures 51