Preparation for disassembly
See Routine care, SATA drive guidelines, and disassembly preparation on page 8 for initial safety procedures.
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as a USB ash drive, from the computer.
3. Turn o the computer properly through the operating system, then turn o any external devices.
4. Disconnect the power cord from the AC outlet and disconnect any external devices.
IMPORTANT: Regardless of the power-on state, voltage is always present on the system board as long
as the system is plugged into an active AC outlet. To prevent damage to internal components, you must
disconnect the power cord from the power source before opening the computer.
5. If the computer is on a stand, remove the computer from the stand.
WARNING! Beware of sharp edges inside the chassis.
Front bezel dust lter
Some models are equipped with an optional front bezel dust lter. You must periodically clean the dust lter
so that the dust collected on the lter does not impede air ow through the computer.
To remove, clean, and replace the dust lter:
1. Prepare the computer for disassembly (Preparation for disassembly on page 15).
2. To remove the dust lter, use your ngers to separate the lter from the front bezel at the tab locations
shown below.
3. Use a soft brush or cloth to clean dust from the lter. If heavily soiled, rinse the lter clean with water.
To install the front bezel dust lter, reverse the removal procedure.
Preparation for disassembly 15
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