Download Files
File Format: 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.
File Name: Latitude_7X40_1.9.1.exe
File size: 24.05 MB
To ensure the integrity of your download, please verify the checksum value.
SHA-256: a7bcd548d11e1d56266bac3f8a9002dd3ec9a543cecb41bf107703d4df645a2c
SHA-512: 9b52a5f7ce4ebcf5f398a3198bf39d8437da45e726ebf70fb61b4c20428f55ae7acb944bec7288fde2ebef02812ac16ffd7651cb9a927435b9aa21016e80b136
File Format: This file format consists of a BIOS Recovery image file. This file is used for the System BIOS Recovery process to recover a system from a corrupted BIOS.
File Name: BIOS_IMG.rcv
File size: 24.05 MB
To ensure the integrity of your download, please verify the checksum value.
SHA-256: a7bcd548d11e1d56266bac3f8a9002dd3ec9a543cecb41bf107703d4df645a2c
SHA-512: 9b52a5f7ce4ebcf5f398a3198bf39d8437da45e726ebf70fb61b4c20428f55ae7acb944bec7288fde2ebef02812ac16ffd7651cb9a927435b9aa21016e80b136
File Format: This file format contains plain text which can be viewed with a standard text editor.
File Name: Third-party License.txt
File size: 1.17 KB
To ensure the integrity of your download, please verify the checksum value.
SHA-256: 6712dba91fdc70396b373e98587ec4669e8c8b0e24e1bcda8dce94e11c96abd4
SHA-512: da0c1e51bc6707afdb5c6e4f7624fe623608c6d275242d910e468dece671d6411b29bccbc5af055e81262eb3e43b6076ce60eafcf1f81f92b51b9f0944aa24d5
Fixes & Enhancements
Fixes: - Fixed the issue where the system audio is distorted when you play video. - Fixed the issue where the system does not turn on when the system battery is under 2%. - Fixed the issue where a warning message is displayed and the system does not charge. Enhancements: - Improved the battery performance.
Important Information
BIOS updates take no more than 5 minutes to be installed on your system. You can install the updates in the background while using the system.
Supported Operating Systems
Installation instructions
Updating the BIOS from Windows
Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off power or interrupt the BIOS update process during the update.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
Download and Installation
1. Click Download File.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file.
4. Double-click the new file.
The system restarts automatically and updates the BIOS at the system startup screen. After the BIOS update is complete, system restarts again.
Updating the BIOS from BIOS Boot Menu (independent of operating system)
Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
Installation
1. Copy the downloaded file to a USB drive. The USB drive does not need to be bootable device.
2. Insert the USB drive into any USB port.
3. Power on the system.
4. At the DELL logo screen, press F12 to access the one-time boot menu.
5. Select BIOS Flash Update in the Other Options section.
6. Click the ... button to browse the USB drive to locate the downloaded file.
7. Select the file and click Ok.
8. Verify the existing system BIOS information and the BIOS update information.
9. Click Begin Flash Update.
10. Review the Warning message and click Yes to proceed with the update.
The system restarts and displays a progress bar at the Dell logo screen. The system restarts again when the update is complete.
Applies to
Latitude 7440;Latitude 7640