Omen HP Laptop Keyboard Left CTRL Key Unresponsive

[KeybardWrk]

My "Left CTRL" key is unresponsive (doesn't work anymore). "Right CTRL" works. The following keys only work with a direct middle hard press (outer edge press does nothing): deofc. These keys may just require cleaning. In contrast, here is everything I've tried for the left ctrl key:

Uninstalled Unnecessary Applications

Cleaned Keys at Hinge

Disabled Services

sfc /scannow, DISM (https://www.makeuseof.com/difference-between-chkdsk-sfc-and-dism-in-windows-10/)

Reinstall Drivers (via Device Manager)

Windows Update to 21H1

Firmware Update (Synaptics, HP)

regedit i8042prt (set start to 1 from 3 and 1 back to 3)

https://windowsreport.com/fix-corrupted-keyboard-driver/ 

regedit Keyboard Layout

Re-imaged via DISM (to latest)

Reset Layout by Language Switch

Disable Language Switch Hotkey

BIOS Update to HP F.24 (latest)

Cleaned Keys Beneath Hinge

Shortcut Keys

System Extensive Test (via BIOS): All PASSED except Battery Check: Primary - Weak (30).

Power down and hold for 60 seconds with dead battery, etc.

 https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Keyboard-stops-working/m-p/671... 

The issue seemed to be temporarily fixed when I changed Adobe Creative Cloud software preferences (as it worked in the application), but after 6 months it doesn't work in any application. Laptop is 5 years old. How can I fix my LEFT CTRL key?

[Echo_Lake]

@KeybardWrk

Thank you for posting on HP Support Community.
 

Don't worry as I'll be glad to help, 
I appreciate your efforts to try and resolve the issue. The last thing I can suggest try and restore the OS back to the factory default, which will isolate whether it’s a software or hardware issue.  The HP Cloud Recovery Tool allows you to download recovery software to a USB drive. You can use the downloaded recovery image file in order to install the Windows operating system. 

• Click here: https://support.hp.com/in-en/document/c04758961#AbT3to perform System Recovery (Windows 10) This document is for Notebook PCs as well. 
• Click here: https://support.hp.com/in-en/document/c06162205 to Use the HP Cloud Recovery Tool (Windows 10)

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

[KeybardWrk]

My @lt-97 (a) key stopped working so I decided to remove the bttery. Tht ws one hell of n dventure. Now, the left+ctrl works gret! On the other hnd, the @lt-97 key does not.

I ttempted to use the lptop in sfe mode. It didn't fix nything. @t this point, it's either the keybord itself or some other issue. Where cn I order @ replcement nd where cn I get it fixed?

[Echo_Lake]

@KeybardWrk

Thank you for posting back.

I'm sending out a private message to assist you with the next course of action. Please check your Private message icon on the upper right corner of your HP Community profile Next, to your profile Name, you should see a little blue envelope, please click on it or simply click on this link: https://h30434.www3.hp.com/t5/notes/privatenotespage
 

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!