Latitude 5521 Service Manual

1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the WLAN card.
7. Remove the WWAN card.
8. Remove the battery.
9. Remove the assembly inner frame.
10. Remove the system board.
    NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve the thermal bond between the system board and heat sink.

The following images indicate the location of the power-button board and provide a visual representation of the removal procedure.