Dell 5000 Series Service Manual page 36

1. I/O port covers (2)
3. system board
5. Using a paper-clip or sim-card ejection tool, remove the sim-card tray from the system board.
1. sim-card tray
6. Remove the screws that secure the system board to the base frame.
7. Lift the system board and remove it off the base frame.
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2. screws (3)
2. paper clip