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.

Dell Inspiron 5420 System BIOS

AUTO INSTALLED This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
Dell Inspiron 5420 System BIOS
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Fixes & Enhancements

Smooth brightness support for Windows 8
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Version

A12, A12

Release date

09 Nov 2012

Download Type

System BIOS

Category

BIOS

Importance

Recommended
Dell Technologies recommends applying this update during your next scheduled update cycle. The update contains changes to maintain overall system health. It ensures that the system software remains current and compatible with other system modules (firmware, BIOS, drivers, and software) and may include other new features.
Available formats
File Format: CPG BIOS Executable for Windows/DOS
File Name: 5420A12.exe
File Size: 5.5 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:
3441e40adc3368c853441e0f1e72d3a6
SHA1:
9043963df3c3d98431de1418aed41ed27e10195f
SHA-256:
b513827af108d3e953da0b67cd6bbb6794578712310d13fd46815c3aff97cd7a

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

Additional details

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Dell Inspiron 5420
Execute 5420A12.exe to flash bios

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

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