Vostro 3400, No audio device is installed

Hi

Here’s the quickest way to fix no sound on a Dell Vostro 3400: first confirm Windows is using the correct output device, then reinstall the audio driver, and finally run Dell diagnostics to tell software trouble from a hardware fault. Dell’s Vostro 3400 service manual also shows the speakers/audio board are separate replaceable parts, so if software fixes fail, the fault may be in the speaker path or audio board.

If it still fails

If Bluetooth and HDMI audio work but the built-in speakers and headphone jack do not, that strongly points to the internal audio path, jack detection, speakers, or audio board rather than Windows alone. The Vostro 3400 service manual confirms the audio board and speakers are serviceable components, so hardware inspection is the next step if reinstalling drivers and BIOS updates do not help.

@anne_droid​ For my case, when using soundcard or gaming headset, it work but disconnecting them, the speaker icon shows "x"

i am experiencing the same problem that had been explained by my brother @Sandy965  but my OS is windows 11 pro same Dell Vostro 11 gen 

Hi

By X do you mean it is Muted?  

OR something else?