Dell 5521, 3521 manual Removing the Coin-Cell Battery, Prerequisites

Removing the Coin-Cell Battery

WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in "Before You Begin" on page 7. After working inside your computer, follow the instructions in "After Working Inside Your Computer" on page 9. For additional safety best practices information, see the Regulatory Compliance Homepage at dell.com/regulatory_compliance.

WARNING: The coin-cell battery may explode if installed incorrectly.

Replace the coin-cell battery only with the same or equivalent type. Discard used coin-cell batteries according to the manufacturer’s instructions.

CAUTION: Removing the coin-cell battery resets the BIOS settings to default. It is recommended that you note the BIOS settings before removing the coin-cellbattery.

Prerequisites

1Remove the battery. See "Removing the Battery" on page 11.

2Follow the instructions from step 1 to step 2 in "Removing the Memory Module(s)" on page 15.

3Remove the hard-drive assembly. See "Removing the Hard-Drive Assembly" on page 23.

4Remove the optical-drive assembly. See "Removing the Optical-Drive Assembly" on page 19.

5Remove the keyboard. See "Removing the Keyboard" on page 27.

6Remove the palm-rest. See "Removing the Palm-Rest" on page 31.

7Remove the system board. See "Removing the System Board" on page 45.

Removing the Coin-Cell Battery 51