Personal Computer User Manual

6. Remove the fan assembly from the computer.
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Replacing the Fan Assembly
1. Align the fan assembly tabs with the holes in the back of the computer.
2. Slide the fan assembly away from the fan release lever until it clicks in place.
3. Reconnect the DC power cables to the drives and system board.
4. Replace the computer cover.
5. Connect the AC power cable to the AC power connector on the back of the power supply.
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6. Connect your computer and devices to electrical outlets, and turn them on.
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System Board
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Removing the System Board
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1. Follow the procedures in "Before You Begin."
2. Remove the floppy drive. To remove the floppy drive, see "Adding a Floppy Drive."
3. Remove any cards that are installed.
4. Disconnect all cables from the system board.
5. Lift up the heat-sink shroud.
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6. Remove the microprocessor heat sink.
7. Remove the fan assembly.
8. Remove the 12 screws that secure the system board to the computer frame.
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Four of the 12 screws that secure the system board to the computer frame also secure the heat-sink base to the system board.
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NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in your Owner's Manual or Product Information
Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.
CAUTION: The microprocessor heat sink can get hot. To avoid burns, ensure that the heat sink has had sufficient time to cool before you touch it.