No HDMI Audio, could not play the test tone, cannot change the default playback device

Hello, I have real trouble with my HP Pavilion dv6-2160us experience (with the i3 - 330 M, no dedicated graphics card) Windows 7-64 bit, SP1 PC and I would be happy to help.

I created a new thread because, despite the fact that many other people have experienced a problem similar to this and have posted what has worked for them, nothing has worked for me.

The problem (s):

My main problem is that I can not any audio to play from my PC to my HDTV HDMI.

When I plug my HDMI cable on my PC and the TV, the TV is recognized in the playback devices, but nothing he can play.

When I try to test the TV in playback devices, I get an error "could not play the test tone.

In addition, I want to mention a few other odd behavior that I think can be a part of the main problem.

In playback devices, I can't change anything. I can't disable or enable a device, I can not set as default playback or communication devices, and I can't save changes to the properties of the device. Whenever I try to change something, as the default playback device, nothing happens, or the changes are immediately reversed.

The Question:

How can I get audio to play through HDMI on my PC (is not a problem with the TV, my other machines HP audio playback over HDMI it is fine)?

What I tried:

I tried:

  • Change the default playback devices, which I am unable to do
  • The utilities of reading Audio de Windows 7 running in a clean boot state
  • Uninstall and reinstall the driver Intel(r) Audio display
  • Uninstallation and reinstallation of the IDT High Definition Audio CODEC
  • Uninstall the IDT Audio PC program under programs and features
  • Disable the IDT High Definition Audio CODEC

Nothing has worked.

The drivers I have are the latest issued by HP

How can I get this to work? I would appreciate help.

I'm at the point where I'm willing to try solutions quite technically involved, so feel free to post those.

Your expertise is greatly appreciated.

Thank you.

OK, I finally have the answer for that.

If you experience this problem even and you want to fix it, you'll need a PC running the same version of Windows 7 that your PC works lot of work but it works without problems, with regard to this point.

Here's what I did to solve the problem:

  1. Create a system restore point.
  2. Run regedit.exe as administrator.
  3. Go to HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices \Audio .
  4. Compare the permissions and attributes of ownership of this key and all subkeys to your work PC.
  5. Change all permissions and property attributes for interest on the defective PC keys as they are the same as those on the operation of the PC.
  6. Restart your faulty computer.

I hope this helps. It worked for me.

Tags: Windows

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