Latitude 5521 Service Manual

1. Follow the procedure in Before working inside your computer.
   CAUTION: Removing the coin-cell battery resets the BIOS setup program’s settings to default. It is recommended that you note the BIOS setup program’s settings before removing the coin-cell battery.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the memory module.
6. Remove the 2280 solid-state drive or 2230 solid-state drive.
7. Remove the WLAN card.
8. Remove the WWAN card.
9. Remove the battery.
10. Remove the heat sink - UMA or discrete based on the system configuration.
11. Remove the assembly inner frame.

The following images indicate the location of the coin-cell battery and provide a visual representation of the removal procedure.