after bios update keyboard backlight not working , need older bios file

[Kumarrameg]

Hi i update the bios to F.21 ,after install my keyboard backlight not working , i wish to downgrade my bios to older one ,please help me to fix this issue or share older bios files to downgrade .

[Echo_Lake]

@Kumarrameg

Thank you for posting on the HP Support Community.
 

Don't worry as I'll be glad to help,

Firstly, perform Windows Update and HP Support Assistant: (do not skip any troubleshooting steps if you feel steps are repeating) 

To check for updates now, select the Start button, and then go to Settings  > Update & security  > Windows Update, and select Check for updates.

Install updates from HP Support Assistant: Go to Download HP Support Assistant to install the tool.

1. To open HP Support Assistant, double-click the HP Support Assistant icon.
2. Click My devices in the top menu, and then click Updates in the My PC or My notebook pane.
3. Click Check for updates and messages to scan for new updates.
4. Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
5. Click the update name for a description, version number, and file size.
6. Select the box next to any updates you want to install, and then click Download and install.

If the issue persists, Turn off the computer and be sure that the AC adapter is connected to power.

Press and hold the Windows + B keys, and then simultaneously press the power button.

After 2 to 3 seconds, continue to press and hold the Windows + B keys, but release the power button. You might hear a series of beeps.

• If the HP BIOS Update screen is not displayed, repeat the previous steps but press the Windows + V keys. If the screen is still not displayed, your computer might not support the feature or there is a hard drive issue.
• If the power light turns off, the power button was held too long. Repeat the previous steps, making sure that you press and hold the power button for only 2 to 3 seconds.
• If a BIOS recovery message is displayed repeatedly, see Recover the BIOS using a USB recovery drive.
• If a message displays that the computer improperly shut down or a boot problem is detected, follow the on-screen instructions to resolve the error.
• If Windows starts, update to the latest BIOS version. Go to HP Consumer Notebook PCs - Updating the BIOS (Basic Input Output System) (Windows) or HP Business Notebook PCs - Updating the BIOS (Basic Input Output System) for more information.
• The HP BIOS Update screen is displayed and the recovery begins automatically.

If this recovery method fails, use another working computer to create a BIOS recovery flash drive to install the latest BIOS file.

Hope this helps! Keep me posted for further assistance.
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