"I have tried everything to make my fingerprint sensor work, but it's still not functioning.

[Maryamimran]

I am facing an issue with my fingerprint sensor not working on my HP EliteBook 840 G3. Despite multiple attempts to enable it, it remains inactive. I would like to download the correct driver to resolve this problem.

[Dragon-Fur]

@Maryamimran 

Welcome to the HP English Community --

The fingerprint reader might be a "blank", that is, not a real sensor but instead a plastic piece that protects the spot where an installed fingerprint sensor would be located.

Open

HP ZBook 15u G3 Mobile Workstation
HP EliteBook 850 G3 Notebook PC
HP EliteBook 848 G3 Notebook PC
HP EliteBook 840 G3 Notebook PC
Maintenance and Service Guide

Go to Pages 14-15  Item #5

Fingerprint reader (select products only) Allows a fingerprint logon to Windows, instead of a password logon.

Page 23

Pages 27-27

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If the fingerprint reader is a "blank" or if the fingerprint sensor has failed (unusual, but can happen), the fingerprint reader sensor hardware can be replaced.

The part number and the assembly instructions are included on Pages 62-63

Fingerprint reader assembly (includes cable, bracket, and bezel)   821165-001

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Next,

Check that the installed fingerprint device is enabled in the BIOS

HP PC Commercial BIOS (UEFI) Setup Administration Guide For Business Notebook and Desktop 2015 Model...

Page 39

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How to open the BIOS on HP EliteBook 840 G3?

HP AI generated answer

Accessing the BIOS on HP EliteBook 840 G3

To open the BIOS on your HP EliteBook 840 G3, follow these steps:

1. Shutdown Your Computer: Ensure that your computer is completely turned off.

2. Power On and Begin Tapping the Esc Key: As you power on the computer, continuously tap the Esc key. This action prompts the system to enter the Startup Menu.

3. Choose the BIOS Setup Option: Once you see the Startup Menu, find and select the option for BIOS Setup by pressing the F10 key.

By following these steps, you should be able to access the BIOS setup menu on your HP EliteBook 840 G3. In the BIOS menu, you can make various configurations related to hardware and system settings.

Sources

1. HP Oct. 2017 BIOS Refresh

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Next,

If the Device Manager must include the Biometric devices section.

AND

If detected, Device Manager will include the type of fingerprint reader.

No Biometric devices section = No fingerprint reader hardware detected.

Generic Example - Device Manager - Biometric devices and illustrations

Note that the illustration includes a "box" fingerprint reader - 

The Box is just a different type of reader hardware.

Device_Manager_Generic_Biometrics_Fingerprint_Camera_4

Next,

If / When you get to the point where you need a driver -- that is, you have a working fingerprint reader sensor installed in the hardware and the Device Manager detects the reader, then the driver is useful.

Synaptics (Validity) Fingerprint Sensor Driver 

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HP Device Home Page - References and Resources

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