My client has purchased a second-hand Razer Blade RZ09. It has no audio at all.

When I look in the Windows Device Manager, not a single audio device is shown.

When I look in the BIOS, no audio devices either.

I am not quite sure if there are supposed to be any dedicated audio devices, or if some audio feature of the graphic card is supposed to be used.

Could anyone give me any pointer what to check?