I have a
Dell Latitude 5420 (tested without HDD) and I’m running a diagnostic tool such as
Aiken Workbench. The problem is that the tool detects the onboard LAN card, but it shows the message:
Interestingly, when I install Windows, the LAN card works perfectly fine, which confirms that the hardware itself is okay. I have tried multiple cables and diagnostic environments, but the result is the same.
For comparison, I have a BIOS dump from a working unit and another from the problematic unit. The file sizes are identical. I suspect the issue might be related to a missing or corrupted PXE/UEFI network driver module in the firmware.
My questions:
- Has anyone experienced this issue before?
- What are the recommended steps to add the proper LAN driver to a diagnostic/WinPE environment, or to safely repair the firmware?
- If no solution can be found, I would appreciate it if any expert who knows how to fix this fault could contact me privately to suggest the right approach.
Thank you in advance for your help.
