Do not turn off your computer or disconnect from the power source while updating the BIOS as this could harm your computer. During the update, your computer will restart and you may briefly see a black screen.

Before updating, please read the installation instructions and important information noted below.

Latitude E5420 System BIOS

Restart required Installed This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
Latitude E5420 System BIOS A08
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Fixes & Enhancements

Systems: Dell Latitude E5420 Series
Version: A08
Release Date: 05/18/2012

Fixes/Enhancements
------------------
1. Addressed LAN cable disable wireless LAN issue.
2. Addressed Video display switch issue.
3. Addressed UEFI OS boot and hibernation issue.
4. Addressed F12 administrator boot options issue.
5. Fixed the issue where UEFI OS hang during installation when fastboot is minimal.

Note:
1. Please note that if the A01 or before A01 BIOS is currently installed on your system,
you must first update to A02 BIOS and then flash to the latest A-rev BIOS.

The BIOS release has been validated on the following operating systems:
1. Microsoft Windows 7
2. Microsoft Windows Vista Service Pack 2
3. Microsoft Windows XP Service Pack 3
Read More

Version

A08, A08

Release date

07 Aug 2012

Download Type

System BIOS

Category

BIOS

Importance

Optional
Dell Technologies recommends reviewing this update to determine if it applies to your system. The update contains changes that impact only certain configurations or provides new features that may or may not apply to your environment.
Available formats View Important Information
File Format: CPG BIOS Executable for Windows/DOS
File Name: E5420A08.exe
File Size: 2.86 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format consists of a BIOS executable file. The Universal (Windows/MS DOS) format can be used to install from any Windows or MS DOS environment.
To ensure the integrity of your download, please verify the checksum value.
MD5:
0293738e72f88b732c93a69de4fb4c36
SHA1:
6eba145c734f098bfa9b4e6ec3c2a1190351d3a1

By downloading, you accept the terms of the Dell Software License Agreement.

Additional details

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Please note that if the A01 or before A01 BIOS is currently installed on your system,
you must first update to A02 BIOS and then flash to the latest A-rev BIOS.
Dell Latitude E5420
Download file to Desktop

The file E5420A08.EXE is using the Universal (Windows/ DOS) format and is designed to be directly executed from Windows environment.


Click Download now.The File Download window appears.

Click the Save button.The Save As window appears.

Select Desktop using the drop-down menu to the right of Save in.

Click the Save button.A progress meter moves as the download is completed.

If necessary, click X in the upper right-hand corner of the Download Progress Window to close it upon completion.

NOTE: Shut down all other applications prior to running the BIOS update utility. The update utility reboots your system in order to get the new BIOS loaded.

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Run the BIOS update utility from Windows environment


Double click the Icon on your desktop labeled E5420A08.EXE.The Dell BIOS Flash window appears

Click the Continue button.The message Pressing OK will close all applications, shut down Windows, Flash the BIOS, then reboot. appears.

Click the OK button.The system will restart and the BIOS Flash will be completed.


Run the BIOS update utility from DOS environment (Non-Windows users)
NOTE: You will need to provide a bootable DOS diskette. This executable file does not create the DOS system files.

Copy the file E5420A08.EXE to a bootable floppy.

Boot from the floppy to the DOS prompt.

Run the file by typing Y:\E5420A08.EXE (where y is the drive letter where the executable is located).

Reboot will be required

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting guide

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