Where to download old BIOS version for EliteBook 840 G5

[HighByte79]

Hello,

I have an issue with Intel Thunderbolt 3 Firmware Update (Failure Code: -2146232576). USB C device does not work, and there is an issue in device manage I can't resolve.

I tried all possible combinations of:

 - uninstalling UCM device

 - uninstalling/deleting Thunderbolt controller

 - resetting BIOS by removing AC and pressing power button for 15 seconds

 - resetting BIOS by removing both batteries and waiting

 - reinstalling BIOS

 - reinstalling BIOS without any batteries

 - reinstalling drivers

 - reinstalling OS by formatting HDD

 - cleaning port using non conductive contact spray and soft horse hair artist brush

Driver update will always fail while BIOS will report that device can't be initialized

I hope that installing older version of BIOS will help reinitialize the device so I can try the update to new version since I have a notebook without functioning USB-C/Thunderbolt port.

Any steps on how to solve the problem are welcome, I've run out of ideas. Only idea I have left so far is installing older version of BIOS (downgrading) but I need a link to older driver versions.

Laptop is second hand, I got it in this state and have no access to laptop history, serial number I copied from HP Support assistant is not recognized by this page. I have another one with different configuration, they both came with same BIOS updates and fresh Win11 OS. Second one has working USB-C port.

Thank you in advance.

[Paul_Tikkanen · Accepted solution]

Hi:

You can find the available previous BIOS files at the link below under the Revision History section.

HP EliteBook 840 G5 Notebook PC Software and Driver Details

Reading the release notes, you can only go back to version 01.14.01, nothing older.

The actual file downloads are after the release notes.