Service Manual
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Replacing the system board
WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow
the steps in Before working inside your computer. After working inside your computer, follow the instructions in After
working inside your computer. For more safety best practices, see the Regulatory Compliance home page at
www.dell.com/regulatory_compliance.
NOTE: Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup
program after you replace the system board.
NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program. You
must make the appropriate changes again after you replace the system board.
Procedure
1. Place the system board on the base frame.
2. Replace the screws that secure the system board to the base frame.
3. Replace the sim-card tray into the system board.
4. Place the I/O port covers on the system board.
5. Replace the screws that secure the I/O port covers to the system board.
6. Place the heat shield on the system board.
7. Replace the screws that secure the heat shield to the system board.
8. Adhere the thermal pads on the system board components and the memory heat-shield.
Post-requisites
1. Replace the base frame.
2. Replace the mobile broadband card.
3. Replace the wireless card.
4. Replace the top cover.
Entering the Service Tag in the BIOS setup program
1. Turn on or restart your computer.
2. Press F2 when the Dell logo is displayed to enter the BIOS setup program.
3. Navigate to the Main tab and enter the Service Tag in the Service Tag Input eld.
NOTE: Service tag is the alphanumeric identier located at the back side of your computer.
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