Microphone stops working

[DMKnight]

We have HP 840 Elitebooks G11's running Windows 10 22H2

When using Bluetooth Headset, the Microphone will stop working and applications cannot find the Microphone.
Noticed in the device manager the Intel Microphone Array device will disappear and under system devices the Intel Smart Sound Technology OED has a warning as below
A reboot will bring back the microphone for a short while and then will go again

"Windows has stopped this device because it has reported problems. (Code 43)

FW dump detected."

Latest Bios and Audio driver installed as recommended by HP support
Also rolled back to older drivers, still same issue

This is happening on all our G11 models 

[maria456s]

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@DMKnight EZ Pass PAwrote:

We have HP 840 Elitebooks G11's running Windows 10 22H2

When using Bluetooth Headset, the Microphone will stop working and applications cannot find the Microphone.
Noticed in the device manager the Intel Microphone Array device will disappear and under system devices the Intel Smart Sound Technology OED has a warning as below
A reboot will bring back the microphone for a short while and then will go again

"Windows has stopped this device because it has reported problems. (Code 43)

FW dump detected."

Latest Bios and Audio driver installed as recommended by HP support
Also rolled back to older drivers, still same issue

This is happening on all our G11 models 

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The disappearing microphone and "Code 43" error with "FW dump detected" on HP 840 G11 Elitebooks running Windows 10 22H2 likely indicates a driver/firmware conflict. Thoroughly uninstall and reinstall audio, Bluetooth drivers, and verify BIOS settings. Run HP hardware diagnostics, check power management, and ensure Windows updates are current. Consider testing with external devices to isolate hardware issues and contact Intel support for specific Intel Smart Sound Technology troubleshooting.

[Banlix]

update your system sound driver to the latest version, Februari 2025, sp157090.exe for Windows 10 64 bit

[DMKnight]

That update has been applied and tested and the issue remains the same

[Banlix]

Have the Bluetooth driver and graphics driver been updated yet?

Usually Intel also provides audio support components in its graphics drivers.

[DMKnight]

Yes they have been updated too
I now have one laptop going back to HP as they want to replace the microphone
However I'm now testing a 5th laptop all have same issue and brand new