I have on old HP ProDesk 490 running with Ubuntu 20.04 (after Windows 7 i switched to Ubuntu). I would like to update the BIOS (currently L02 v02.11 from 2013) since i have some problems with the fan speed.The straightforward way for updating the BIOS would be the HP Support Assistant, which runs only on Windows. I dont want to install Windows, just to be able to update the BIOS and i dont think it would be advisable to try some experiments with a VM.
The section "Update the BIOS manually from a USB Flash drive (outside of Windows)" describes an easy way for exactly what i want: Generating a bootable USB drive which can be used on any OS to update the BIOS. According to the manual, this could be done by exxecuting the downloaded driver sp****.exe. There should be an option "Create recovery USB flash drive" for directly creating a bootable USB drive.
If so, you can install the free 7-Zip file utility, right click on the BIOS update file, select 7-Zip from the list of items on the menu and have 7-Zip Extract to: and let it extract the exe file into its folder name (sp96015).
Then there is a DOS flash folder within that file which you can use to update the BIOS as follows...
You don't even need to create a bootable USB flash drive. You can update the BIOS directly from the BIOS menu.
Read the instruction file inside the unzipped exe file, and follow the instructions under this section...
Startup Menu / F10 Setup BIOS Flashing
The HP Business Desktop systems provide a BIOS upgrade option through both the Startup Menu and the F10 Setup utility using the "Flash System ROM" feature. Reboot the PC and press the Escape key to display the Startup Menu. Use the arrow keys to select Utilities, and then select the Flash System ROM option. Alternatively, reboot the PC and press F10 to access the BIOS Setup utility. In the File menu, select Flash System ROM. Either method requires that removable media be present (USB storage or data CD) that contains the BIOS binary image file in the root directory. The binary image file can be found in the DOS Flash folder and is namedxxx_MMmm.binwhere "xxx" is the BIOS family, "MM" is the major version number, and "mm" is the minor version number. To create a CD for updating the BIOS, use a blank CD-R or CD-RW disk on a system with a CD-RW or DVD+RW drive, and write the binary to the disk using any CD-burning software (Windows 7 and Vista support burning data CDs without additional software). If a BIOS Setup password has been set, the password will be required before being able to access the "Flash System ROM" menu. The user is notified when the process is completed. The new BIOS code will not take effect until the PC is restarted.
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