Hp Elitebook 840 G5 no audio device detected for internal audio speakers

[adilupu7]

Hi,

I have a Hp Elitebook 840 G5 that has audio problems. The audio chip on it is a Conexant CX7750 as it shows in the BIOS.

The audio device is not detected on Windows 10, Windows 11 or Ubuntu. 

Audio is enabled in the BIOS, tried all possible drivers, installed, uninstalled them but nothing.

Not even the HP PC Diagnostic tool is able to detect the audio device.

Audio is however working when docked or a Bluetooth speaker is connected.

[Mido17]

not sure if this is the same problem, but i had a similiar experience, and found a solution, details here : 

https://h30434.www3.hp.com/t5/Notebook-Audio/No-audio-device-found-after-Windows-update/m-p/8672910

if it can help

[adilupu7]

Hi,

Thanks for the help. I tried your solution but still nothing. In my case  testing the sound in the BIOS is not working.