Dell Precision 3540 and Latitude 5400/5500 System BIOS

Restart required

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.

hi testing

Driver Id : T3T35

Importance : Critical

Version : 1.38.0, 1.38.0 Latest version Recommended version Latest and Recommended version

Release Date : 11 Jul 2025

Download Type : System BIOS

Category : BIOS

This package contains the Dell system BIOS update. BIOS is a firmware package that is embedded on a small memory chip on the system board. It controls the keyboard, monitor, disk drives, and other devices. This update addresses the Dell Security Advisories (DSA). A security advisory is a statement when a security vulnerability impacts a product, and a remedy is available for the vulnerability.

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_5X00_Precision_3540_1.38.0.exe

File size: 31.23 MB

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

MD5: aaff4a4d0f850e4605bceeebb0c2eef4

SHA1: bf2d6479ab7edf13b6915b5f388b719aff397073

SHA-256: 1a81bb86942504ebfc84b2baffe10c9583cf57771e2e0833dc9d441a618a5ce8

Download .EXE

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: 31.23 MB

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

MD5: aaff4a4d0f850e4605bceeebb0c2eef4

SHA1: bf2d6479ab7edf13b6915b5f388b719aff397073

SHA-256: 1a81bb86942504ebfc84b2baffe10c9583cf57771e2e0833dc9d441a618a5ce8

Download .RCV

File Format: This file format contains plain text which can be viewed with a standard text editor.

File Name: Latitude_5X00_Precision_3540_1.38.0-eng.txt

File size: 411.38 KB

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

MD5: e70b702d1e331864fbcf065669715c3e

SHA1: 96b9a7918dfd8db41274183f466de2637f968c68

SHA-256: 77823c123ec35ae91ced2a9691c466b46d3aacb07700c0cf4fe5a97006179993

Download .TXT

Important Information

- Once the BIOS is upgraded, you cannot downgrade the BIOS to earlier versions. BIOS downgrades are restricted when there are security updates and important fixes with earlier versions that impact the functionality of the system.
- 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.

Compatible Systems

Latitude 5400

Latitude 5500

Precision 3540

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. You do not need a bootable USB drive.
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 Flash Progress bar at the Dell logo screen. The system restarts again when the Flash update is complete.

Dell Precision 3540 and Latitude 5400/5500 System BIOS

Download Files

Fixes & Enhancements

Important Information

Compatible Systems

Supported Operating Systems

Installation instructions

Applies to