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

Recommended

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Fixes & Enhancements

*BIOS Issue fix:
1. BITS041305 AM4-W8: Re-Download image the UEFI network option will lost and have error when load defaults bios.
2. BITS030968 AM3-W8-UPG: IRST(FFS) option lost in BIOS setup after UPG Win7 BIOS:A05 to Win8 BIOS:X49.
3. BITS032645 AM3:IRST(Rapid start) option will missing if attached USB device then Boot to BIOS/OS.
4. BITS030275 AM4-W8: In MFG 64 mode (value 40h),the boot menu will add boot options.
5. BITS030321 AM4-W8:Set MFG 64,then try to change the boot sequence and save exit the system will prompt warning
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*EC issue fix:
1. BITS041667 AT7-D-W8:SUT will blackscreen after BIST test finish, then shutdown UUT & system will crash
2. BITS041551 AM3-W8: SUT can't successfully auto reboot to OS afterLCD BIST test via D + Power button.
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* BIOS Feature update:
1. Dell ePSA OPROM upgrade to the revision 4220.9
2. Modify the description in UEFI Network boot option.
3. Fix the "Windows Boot Manager" can be missing in the boot menu with the failure rate.
4. Fix sdtESTAT64.exe will show fail when run command "/E" or "/D" or "/R".

Version

A09, A09

Release date

15 Oct 2012

Download Type

System 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: 5420_A09.exe

File Size: 5.5 MB

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.

Download

To ensure the integrity of your download, please verify the checksum value.

MD5:

538285bcb9d4d0cb81f262421e2dbb6e

SHA1:

efa26b468eb4875d45c2d524daf4556efdfca84b

SHA-256:

d57c812b5ee0ae8bf1a1a77a7c585ded2c6f382b6e1a938ae2182520cb3405c6

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