Dell SC440 owner manual Replacing the I/O Panel Assembly, Removing the System Board

Replacing the I/O Panel Assembly

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

1Fit the I/O panel assembly into the holding tab on the front of the chassis. See Figure 3-22.

2Secure the I/O panel assembly by replacing the screw. See Figure 3-22.

3Connect the I/O panel ribbon cable to the new I/O panel connector.

4Replace the large processor cooling fan. See "Replacing the Cooling Fans" on page 67.

5Replace the heat sink and shroud assembly. See "Replacing the Processor" on page 65.

NOTE: To prevent damaging the processor, clean the heat sink to remove any thermal grease and then apply fresh thermal grease to the processor before installing the heat sink.

6Close the system. See "Closing the System" on page 41.

7Reconnect the system to the electrical outlet, and turn on the system.

System Board

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

CAUTION: The heat sink can get hot during operation. To avoid burns, ensure that the system has sufficient time to cool before removing the system board.

Removing the System Board

1Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

2Open the system. See "Opening the System" on page 41.

3Depending on your configuration, disconnect the following cables from the system board. See Figure 6-2 for connector locations.

•Two power-supply cables from the POWER and 12VPOWER connectors

•Diskette data cable from the FLOPPY connector

•I/O panel cable from the FRONTPANEL connector

•5.25-inch device data cable from the IDE connector

•Processor cooling fan cable from the FAN_CPU connector

•Card cage cooling fan cable from the FAN_CARD_CAGE connector

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Installing System Components