HP EliteBook 840 G11 Core Ultra 5 125U Keyboard Backlight Not Working Fix

Keyboard Fix

HP EliteBook 840 G11 Keyboard Backlight Not Working Fix

HP EliteBook 840 G11 · Core Ultra 5 125U · Windows 11 · Backlit keyboard

When the keyboard backlight on the HP EliteBook 840 G11 does not turn on or the backlight key (F5 with keyboard icon) has no effect, the cause is usually a driver issue, a BIOS setting, or a keyboard illumination setting that has been reset. Follow these steps to restore backlight functionality.

Fix 1 — Use the keyboard backlight shortcut

Press Fn + F5 to cycle through backlight brightness levels (off, low, medium, high) on the HP EliteBook 840 G11. If Fn lock is active, press Fn + Esc to toggle it off. Some EliteBook models also support pressing just F5 without Fn if the Fn key is unlocked.

Fix 2 — Install the HP Keyboard Illumination driver

Go to HP Support, find the EliteBook 840 G11, and download the HP Keyboard Illumination driver under Input Devices. This driver controls the backlight intensity levels and keyboard shortcut behavior. Without it, the backlight key may produce no response in Windows.

Fix 3 — Install HP HotKey Support

The keyboard backlight shortcut on the EliteBook 840 G11 depends on HP HotKey Support being installed and running. Check in Control Panel → Programs whether HP HotKey Support is listed. If not, download it from HP Support and install it. Without this service, all Fn key shortcuts including backlight control are non-functional.

Fix 4 — Confirm the keyboard backlight is enabled in BIOS

Restart and press F10 to enter BIOS Setup. Navigate to Advanced → Built-in Device Options and confirm Backlit Keyboard is set to Enabled. Some HP BIOS resets this to disabled as a power-saving default during a firmware update.

Fix 5 — Check keyboard illumination timeout setting

Open HP System Event Utility (if installed) or go to BIOS → Advanced → Built-in Device Options → Keyboard Illumination Timeout. If set to a very short timeout (5 seconds), the backlight turns off almost instantly after each keypress and may appear non-functional. Set the timeout to 60 seconds or longer.

Amirah, Kuala Lumpur: “The keyboard backlight on my EliteBook 840 G11 stopped working after reinstalling Windows. Installing HP Keyboard Illumination driver and HP HotKey Support from HP Support fixed it in minutes.”

Frequently Asked Questions

Does the HP EliteBook 840 G11 come with a backlit keyboard as standard?

Not on all configurations. The keyboard backlight is a configurable option on the EliteBook 840 G11 and may not be present on base configurations. To confirm, check the keyboard under ambient light for backlight LEDs under each key, or check the original order specification sheet.

Can the EliteBook 840 G11 keyboard backlight be set to turn on automatically in low light?

Yes, on configurations with the ambient light sensor. In BIOS or HP System Event Utility, look for Automatic Backlight Control and enable it. This uses the ambient light sensor to turn on the keyboard backlight when the environment becomes dark, without needing to press the shortcut key.

How many brightness levels does the EliteBook 840 G11 keyboard backlight have?

The EliteBook 840 G11 keyboard backlight has three levels: off, low (25%), and high (100%). Pressing Fn + F5 cycles through these levels in order. Some BIOS versions may allow additional intermediate levels through the keyboard illumination settings.

Why does the keyboard backlight turn off after a short time on the EliteBook 840 G11?

The keyboard backlight timeout is controlled by either the BIOS setting or HP System Event Utility. By default, it turns off after a set period of keyboard inactivity to conserve battery. Increase the timeout value in BIOS or HP System Event Utility to keep it on longer.