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 Precision M6400 System BIOS, A01

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 Precision M6400 System BIOS
Recommended

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Fixes & Enhancements

Fixes / Enhancements:
1. Fixed issue setting Admin password after inserting a hard drive
with no password installed.
2. Fixed issue where Computrace Setup option is grayed out if changes
are aborted.
3. Fixed issue where DCP may display multiple battery health warning
messages.
4. Fixed Wi-Fi Catcher hang issue on certain systems.
5. Fixed panel white screen flash when resuming from S4 under Vista.
6. Fixed issue where USB PowerShare might keep a device powered when
entering Standby.
7. Fixed issue where SMBIOS memory strings may be incorrect.
8. Fixed low performance issue in XP64 after S3 resume.
9. Fixed issue where some Setup options were not accessible with only
the keyboard.
10. Fixed incorrect Setup parallel port text.
11. Fixed issue where Admin password can be set when a hard drive password
exists.
12. Added SMBIOS support for reading/writing Password Changes option.
13. Changed default settings for Keyboard Illumination option.
14. Improved AC adapter detection.
15. Updated the Dell embedded diagnostics ROM image to build 4117.
Read More

Version

A01, A01

Release date

19 Nov 2008

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: M6400A01.EXE
File Size: 1.19 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:
c3b5a7f24b46831e6a2dcc75d9713fbe

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

Additional details

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Installation Instructions for the Universal (Windows/ DOS) format


  1. Download file to Desktop


  2. Use one of the methods below to flash the Bios.





Download file to Desktop


The file M6400A01.EXE is using the Universal (Windows/ DOS) format and is designed to be directly executed from Windows environment.


  1. Click Download now.
    The File Download window appears.


  2. Click the Save button.
    The Save As window appears.


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


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


  5. 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.


Run the BIOS update utility from Windows environment


  1. Double click the Icon on your desktop labeled M6400A01.EXE.
    The Dell BIOS Flash window appears


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


  3. 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.

  1. Copy the file M6400A01.EXE to a bootable floppy.


  2. Boot from the floppy to the DOS prompt.


  3. Run the file by typing Y:\M6400A01.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 guide

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