11-08-2023, 16:21
Dell Latitude 5420 BIOS upgrade (v.1.26.2)
Last Updated November 11th, 2023
The Dell Latitude 5420 Host PC will run most optimally with BIOS revision 1.26.2. Some early models of this device may predate the release of this BIOS revision, so it's best to update to this version if you're using an older version of the Host software. The instructions below will illustrate how to check your BIOS version and how to upgrade if necessary.
DO NOT UPGRADE BEYOND VERSION 1.26.2. Future releases of the BIOS may become available over time, however please refrain installing any version greater that 1.26.2 as they have not been fully vetted yet. This post will be updated if/when new releases are vetted and deemed suitably compatible with the EyeLink Host software.
Checking BIOS Version
Last Updated November 11th, 2023
The Dell Latitude 5420 Host PC will run most optimally with BIOS revision 1.26.2. Some early models of this device may predate the release of this BIOS revision, so it's best to update to this version if you're using an older version of the Host software. The instructions below will illustrate how to check your BIOS version and how to upgrade if necessary.
DO NOT UPGRADE BEYOND VERSION 1.26.2. Future releases of the BIOS may become available over time, however please refrain installing any version greater that 1.26.2 as they have not been fully vetted yet. This post will be updated if/when new releases are vetted and deemed suitably compatible with the EyeLink Host software.
Checking BIOS Version
- Press F12 while powering on the Host PC until you see the "One-time boot menu."
- Note the BIOS revision in the top left corner of the screen.
- If the BIOS revision is less than 1.26.2, please follow the instructions in the attached PDF to complete the upgrade.

