Dell 7420, 5420 owner manual Replacing the Coin-Cell Battery

24 Replacing 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 9. For additional safety best practices information, see the Regulatory Compliance Homepage at dell.com/regulatory_compliance.

WARNING: The battery may explode if installed incorrectly. Replace the battery only with the same or equivalent type. Discard used batteries according to the manufacturer’s instructions.

Procedure

With the positive-side facing up, snap the coin-cell battery into the battery socket on the system board.

Postrequisites

1Follow the instructions from step 4 to step 7 in "Replacing the System Board" on page 103.

2Replace the fan. See "Replacing the Fan" on page 65.

3Replace the speakers. See "Replacing the Speakers" on page 69.

4Follow the instructions from step 5 to step 8 in "Replacing the Hard Drive" on page 39.

5Follow the instructions from step 4 to step 5 in "Replacing the Optical Drive" on page 43.

6Replace the memory module(s). See "Replacing the Memory Module(s)" on page 33.

7Replace the palm rest. See "Replacing the Palm Rest" on page 49.

8Replace the keyboard. "Replacing the Keyboard" on page 25.

9Replace the base cover. "Replacing the Base Cover" on page 29.

10Replace the battery. "Replacing the Battery" on page 19.

11Follow the instructions in "After Working Inside Your Computer" on page 11.

Replacing the Coin-Cell Battery 61