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,SW,BIOS,LAT,E5420,A05,A05
Installed This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.E5420 BIOS A05
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Fixes & Enhancements
1. Addressed some express cards fail to be detected issue.
2. Addressed Hard Drives encryption issue in ATA mode.
3. Addressed some keyboard with USB Hub not accessible during POST.
4. Fixed issue where disabling webcam stops microphone from working.
5. Fixed issue where battery temperature sensor throttling CPU at high temperature when external power.
6. Fixed issue where Video memory size limited to 256MB in WinXp.
7. Fixed issue where Free Fall Sensor protection doesn't work after resuming from S3.
8. Fixed issue where TPM measurements were not correct when authenticating via PBA.
9. Updated Intel ME Firmware to 7.1.20.1119.
10.Added support for Signed Firmware Update Transition BIOS.
11. Fixed issue where TDM PBA SSO doesn't work when both FP and TDM PBA SSO are set for single user.
12. Addressed some keyboard with USB Hub not accessible during POST.
13. Updated to the 1.4.0 version of Intel PPM Reference Code.
14. Updated to the MOB_P_13 version of the Intel microcode patch.
15. Updated to the 1.05 version of Dell GPE.
16. Added new key for Signed Firmware Updates.
Read More2. Addressed Hard Drives encryption issue in ATA mode.
3. Addressed some keyboard with USB Hub not accessible during POST.
4. Fixed issue where disabling webcam stops microphone from working.
5. Fixed issue where battery temperature sensor throttling CPU at high temperature when external power.
6. Fixed issue where Video memory size limited to 256MB in WinXp.
7. Fixed issue where Free Fall Sensor protection doesn't work after resuming from S3.
8. Fixed issue where TPM measurements were not correct when authenticating via PBA.
9. Updated Intel ME Firmware to 7.1.20.1119.
10.Added support for Signed Firmware Update Transition BIOS.
11. Fixed issue where TDM PBA SSO doesn't work when both FP and TDM PBA SSO are set for single user.
12. Addressed some keyboard with USB Hub not accessible during POST.
13. Updated to the 1.4.0 version of Intel PPM Reference Code.
14. Updated to the MOB_P_13 version of the Intel microcode patch.
15. Updated to the 1.05 version of Dell GPE.
16. Added new key for Signed Firmware Updates.
Version
A05, A05
Release date
17 Jan 2012
Download Type
System BIOS
Category
BIOS
Importance
RecommendedDell 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: Flash BIOS executable
File Name: E5420_A05.exe
File Size: 2.81 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. To use it, download the file and copy it to a DOS-bootable USB flash drive, then boot the system to the USB flash drive and run the program.
To ensure the integrity of your download, please verify the checksum value.
MD5:
c123b4778a2664968bf1dab048a871b8
SHA1:
bfb6a73447d4351f5322dac261622786a6a2da2f
By downloading, you accept the terms of the Dell Software License Agreement.
Applies to
Dell Latitude E5420
Installation instructions
Download file to Desktop
The file E5420_A05.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 E5420_A05.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 E542_0A05.EXE to a bootable floppy.
Boot from the floppy to the DOS prompt.
Run the file by typing Y:\E5420_A05.EXE (where y is the drive letter where the executable is located).
The file E5420_A05.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 E5420_A05.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 E542_0A05.EXE to a bootable floppy.
Boot from the floppy to the DOS prompt.
Run the file by typing Y:\E5420_A05.EXE (where y is the drive letter where the executable is located).
Need help with BIOS issues?
Find a solution in Dell's BIOS troubleshooting guideDrivers help and tutorials
For more downloads go to the Drivers and downloads. For help on using the information on this page, please visit Driver Help and Tutorials.