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HP Notebook PCs - High Definition Media Interface (HDMI) Icon Disappears from the Sound Properties in the Control Panel

This document pertains to HP Notebook PCs with Windows Vista.
Understanding why the HDMI icon disappears from the sound properties in the Control Panel
The HDMI icon in the sound properties of the Control Panel may intermittently disappear, always display Working status, or always display Not Plugged in status.
The audio output channel may not automatically switch to HDMI when the notebook PC is connected to an HDMI TV/LCD.
If the issue occurs, perform one of the solutions below.
HDMI icon disappeared
If the HDMI icon disappears from the sound properties in the Control Panel, the HDMI port cannot receive audio. To restore the HDMI icon, follow the steps below.
  1. Reinsert the HDMI cable into the HDMI port on the notebook PC.
  2. After approximately 10 seconds, switch the audio source in the Control Panel.
    • Click Start, Control Panel, Hardware and Sound and then click Sound.
    • Select the HDMI audio device, click Set Default and then click OK.
To switch the audio source in the Control Panel, follow the steps below.
  1. Click Start, Control Panel, Hardware and Sound, and then Sound.
  2. Select the HDMI audio device, click Set Default, and then OK.
The HDMI icon reappears in the sound properties in the Control Panel and the HDMI port can now receive audio.
HDMI icon always displays Working
If the HDMI icon always displays Working status, the audio source is always directed to the HDMI port.
To remove constant Working status from the HDMI icon, follow the steps below.
  1. Reinsert the HDMI cable into the HDMI port on the notebook PC.
  2. After approximately 10 seconds, switch the audio source in the Control Panel.
To switch the audio source in the Control Panel, follow the steps below.
  1. Click Start, Control Panel, Hardware and Sound, and then Sound.
  2. Select another audio device, click Set Default, and then OK.
The HDMI icon no longer constantly displays Working status and the audio source is no longer always directed to the HDMI port.
HDMI icon always displays Not Plugged in
If the HDMI icon displays Not Plugged in, audio and video cannot output to the HDMI port.
To remove Not Plugged in status from the HDMI icon, follow the steps below.
  1. Remove the HDMI cable from the HDMI port on the notebook PC.
  2. Reinsert the HDMI cable into the HDMI port on the notebook PC.
  3. After approximately ten seconds, switch the audio source in the Control Panel.
To switch the audio source in the Control Panel, follow the steps below.
  1. Click Start, Control Panel, Hardware and Sound, and then Sound.
  2. Select another audio device, click Set Default, and then OK.
The HDMI icon no longer displays Not Plugged-in status. Audio and video can now output to the HDMI port.

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