[arch-general] Sound card marked as unavailable in pulseaudio

Hi Does anyone know why my sound card may be listed as unavailable? I got a built-in Intel sound device which is seen by pulseaudio. In the volume control settings (pavucontrol-qt) I can select the configuration Analog Stereo Duplex (unplugged) (unavailable) I don't know why it shows as unplugged and unavailable. This is not a new situation but I remember a few years ago I could use this internal sound card just fine. Thanks Andy