Cannot Lock Fn Key

[Aymankoo]

I have HP 450 G6, when I bough it I was able to lock Fn key as documented by pressing FnKey + leftShift. I upgraded all my HP drivers from hp website and I also upgraded my windows after that I am not able to lock the FnKey any more. 

Any Help

[-Houston]

This problem occurs on all G6 Probooks. We have here HP Probook 450 G6. It came with BIOS version 1.2.xx (xx was for sure not 00, but I don't remember exact number). After upgrading BIOS to 1.3.00 the FN LOCK function stops working (FN led stays off).

Some people reported, that downgrade BIOS to 1.2.00 help solved the issue.

In our case, downgrading back to 1.2.00, Windows 10 was UNABLE TO BOOT.
It freeze on HP logo screen with Windows 10 dots.

Windows will boot only in SAFE mode. Even Windows setup will not boot.

I recommend to go to support.hp.com, choose your NB model, download both BIOS (1.2.00 and 1.3.00).

Enter in elevated command prompt this command:

BCDedit /set {current} bootmenupolicy Legacy

(This will enable legacy Windows F8 boot menu, it come handy in case Windows 10 will not boot)

Downgrade BIOS to 1.2.00 using downloaded package

Try if problem is resolved. If Windows will not boot, simply keep tapping F8 after power on and choose SAFE MODE.

Windows will boot and you can upgrade back to 1.3.00. Start hoping for BIOS fix from HP. They know about this bug more than a month.

[-Houston]

Problem is fixed now in new BIOS version 01.08.03RevA (alias Firmware Pack R71) released as SP98476.

Fix and enhancements contains:
- Fixes an issue where the Fn Lock does not function properly after the BIOS is updated to 01.03.00.

https://support.hp.com/sk-en/drivers/selfservice/swdetails/hp-probook-450-g6-notebook-pc/23201167/sw...
or direct link
https://ftp.hp.com/pub/softpaq/sp98001-98500/sp98476.exe