No HDMI Sound on dv6t-1100 CTO [ Edited ]

[dustnik3]

I have a dv6t-1100 CTO Entertainment notebook computer. When I bought it, it came installed with Windows Vista. Then, I was able to connect it to my home theatre system via HDMI by simply choosing the HDMI output . Since I upgraded to Windows 7, when I attach the HDMI cable, the picture is on the TV, but the sound is still coming from the computer speakers. My sound is IDT HD sound. I opened up the settings to change the sound output to HDMI, but found only the following choices;  Speakers and Dual Headphones (default), Independent Dual Headphones, and SPDIF (digital output vis HP dock). I tried changing the default choice to the last one with no difference. I believe I have the latest driver installed. Please help, as I want to hook up the laptop to my home theatre system to run a special holiday program I have. Any assistance would be greatly appreciated.  

[DavidPK]

Hi,

As you are outputting through HDMI you will need the relevant High Definition Audio Codec associated with your make of graphics card/chip.  So for example, if you have an Nvidia graphics card, you will need the Nvidia High Definition Audio Codec.  This should be installed automatically when you install your graphics driver.  If you go to Windows Device Manager, check your graphics card/chip type under Display Adapters and then check under Sound Video and Game Controllers whether you have the corresponding High Def Codec.  If the audio codec is missing, try installing the latest driver software for your graphics card to see if this solves the issue.

Let me know how you get on.

Best wishes,

DP-K

[dustnik3]

UInder Display Adaptors, it says Mobile Intel(R) 4  Series Express Chipset Family. Under Sound, Video and Game Controllers, it lists two HD drivers - the first, IDT High Definition Audio Codec and the second,  Intel(R)  High Definition Audio HDMI. Do I still need to download something more?

[DavidPK]

Hi,

The Intel(R)  High Definition Audio HDMI codec is the one you need for audio over HDMI so the question is why it's not appearing in the options under playback devices.

Try this to see if it helps.  Download the Chipset driver and Graphics driver on the links below and save the installers to your Desktop.

Chipset

Graphics

Next, in Device Manager, right click on the Intel graphics chip and select Properties.  Click the Driver tab and then select uninstall.  When done, do the same for the for the Intel High Definition Audio Codec.

Now return to the Desktop and install the Chipset driver and then the Graphics driver.  When complete, reboot the PC and see if this has helped.  Check in Device Manager that both the Intel Graphics and Hi Def Audio codec have reinstalled successfully and whether you now see the HDMI Audio option under playback devices as shown as the top option on the screenshot below ( ignore the fact that it's ATI, i just mean the TV icon option )

http://s175.photobucket.com/albums/w146/rproffitt2000/?action=view&current=7Speakers.png&newest=1

Look forward to hearing from you.

Best wishes,

DP-K

[dustnik3 · Accepted solution]

It worked!!! Thank you so much, David.

[DavidPK]

Hi,

I'm really glad you got it working.

All the best,

DP-K

[gtmeier]

I have the same problem with no audio on the hdmi cable/output port.  Connected to a panasonic plasma.  video is fine, but no audio at all.  Tried removing the hdmi driver & reinstalling.  No effect.  When checking under "sound" the volume bar on the right does not show any audio response.  Running Vista & using NVidia GeForce 8200M G card.  Suggestions?

[blewen]

Hi DP-K:

You instructions were apparently great for David and I tried to follow them since I had the same problem.  I downloaded the driver per you instructions but I could not  find reference to the "intel graphics chip" in the device properties.   I'm running a HP Pavilion dv9500t notebook with  Windows 7, have an Nvidia 8600M GS graphics card,  Realtek High Definition Audio and a Unimodem Half-Duplex Audio device.

I'd appreciate any help can give me.  If you need further information about my system, please let me know.

Bert Lewen

[shanti]

Here also no sound when i use the tv.

When i just bougt my laptop i remember that it worked.

nvidia 8200Mg and philips tv

I also tried much but have not an answer yet

Jeanne

[DavidPK]

Hi Bert,

As there are no Windows 7 specific drivers for your PC, it may be worth trying the Vista ones.

Download the Vista Chipset driver and save it to your Desktop.

ftp://ftp.hp.com/pub/softpaq/sp36501-37000/sp36881.exe

Download the Vista Graphics driver on the link below and save the installer to your Desktop.

ftp://ftp.hp.com/pub/softpaq/sp42501-43000/sp42635.exe

Next, in Device Manager, open Display Adapters, right click on the Nvidia graphics chip and select Properties.  Click the Driver tab and then select uninstall.  When done, still in Device Manager, open Sound Video and Game Controllers and do the same for the for the Nvidia High Definition Audio Codec.

Now return to the Desktop and install the Chipset driver and then the Graphics driver.  When complete, reboot the PC and see if this has helped.  Check in Device Manager that both the Nvidia Graphics and Nvidia Hi Def Audio codec have reinstalled successfully and whether you now see the HDMI Audio option under playback devices as shown as the top option on the screenshot below ( ignore the fact that it's ATI, i just mean the TV icon option )

http://s175.photobucket.com/albums/w146/rproffitt2000/?action=view&current=7Speakers.png&newest=1

If it shows up correctly, try the HDMI connection.

Best wishes,

DP-K