HDMI Audio is not on Playback List

I have a Pavilion dv7 running Windows 7.  I've had the laptop for 3 years now with excellent service.  Recently, I purchased a flat screen TV and I would like to play programming from my laptop to the TV by HDMI connection.  I have a high quality cable that has worked in this case sporadically, since the HDMI audio playback option likes to periodically disappear from the Playback Device list.  The few times in the past when the HDMI audio option has gone missing, I have somehow managed to get it to return by replacing drivers or doing some other kind of recovery.  Right now, it's missing and I can't get it back.
I have tried a number of the standard fixes to no avail.
First, I checked to see if the IDT High Def Audio CODEC was "disabled."  No, it's "running properly" and is "enabled."
Second, I checked to see it the driver for the IDT was up to date.  Yes it is.
Third, I tried removing the device and its driver completely and reloading the IDT.  Good exercise, didn't work.
Next, I tried running a full set of updates to Windows etc., since I'm not good at keeping up to date.  Still doesn't work.
As I write this, I am connected by HDMI cable to my TV and the HDMI Audio option doesn't appear on the Playback List, so that's not the problem.
In case it helps, the Playback Devices list has two entries.  The first one is "Speakers and Headphones" and it is my "default" device.  The second one is "Independent Headphones".
It's been annoying in the past to have the HDMI Audio come and go like this but this time it's really stubborn and it's making me really crazy.  I'm sure I'm missing something but I just can't figure it out.
Help!!!!!

labargephoto wrote:
I have a Pavilion dv7 running Windows 7.  I've had the laptop for 3 years now with excellent service.  Recently, I purchased a flat screen TV and I would like to play programming from my laptop to the TV by HDMI connection.  I have a high quality cable that has worked in this case sporadically, since the HDMI audio playback option likes to periodically disappear from the Playback Device list.  The few times in the past when the HDMI audio option has gone missing, I have somehow managed to get it to return by replacing drivers or doing some other kind of recovery.  Right now, it's missing and I can't get it back.
I have tried a number of the standard fixes to no avail.
First, I checked to see if the IDT High Def Audio CODEC was "disabled."  No, it's "running properly" and is "enabled."
Second, I checked to see it the driver for the IDT was up to date.  Yes it is.
Third, I tried removing the device and its driver completely and reloading the IDT.  Good exercise, didn't work.
Next, I tried running a full set of updates to Windows etc., since I'm not good at keeping up to date.  Still doesn't work.
As I write this, I am connected by HDMI cable to my TV and the HDMI Audio option doesn't appear on the Playback List, so that's not the problem.
In case it helps, the Playback Devices list has two entries.  The first one is "Speakers and Headphones" and it is my "default" device.  The second one is "Independent Headphones".
It's been annoying in the past to have the HDMI Audio come and go like this but this time it's really stubborn and it's making me really crazy.  I'm sure I'm missing something but I just can't figure it out.
Help!!!!!
Hello labargephoto.
When you're in the playback window right click in the white space and ensure that "show disabled devices" and "show disconnected devices" are both enabled.  You should then be able to activate the HDMI audio.
Let me know if this helps.  I hope you have a great day!
Please click the white star under my name to give me Kudos as a way to say "Thanks!"
Click the "Accept as Solution" button if I resolve your issue.

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    I run strictly using the nVidia K1000M on my W530, and am using the latest nVidia retail graphics driver 340.66 downloaded from the nVidia driver site and installed with my W530 in "discrete graphics" mode. Thus the miniDP connector on the W530 is guaranteed to be controlled by the K1000M, both for external monitor/TV video as well as for external digital audio.

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