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mikep56

TF7050-M2 mobo with NVidia HDMI problem

9 posts in this topic

Hi All,

I have used these forums extensively in the past for both questions and answers, and this time I have a problem.

I have used this same motherboard in 3 PCs, so I have something to compare with. I have a TF7050-M2 motherboard that I am using to watch ripped DVDs. This is my HTPC system. The system has Windows XP3 w/SP3 and WinDVD to watch movies. The way my home TV system is set up is via a multmedia receiver and switching system that selects satellite (SAT), DVD (DVD), Blu-Ray, etc. sources and sends the video and audio to the TV.

The HTPC in has a 500GB internal HD. I recently removed the PC from it's setup to add an external USB hard drive to it for more storage.

When I went to replace the HTPC, the videos were displayed properly, but there was no audio. Now comes the tricky part. I tried different settings for the audio because I didn't remember exactly what the audio settings were. My nephews who watched a lot more movies than I did said that when they set it up the way they remember, there was still no audio. The HTPC connected to my multimedia receiver with an HDMI cable and 2 RCA cables. The receiver was set to "DVD" to watch the HTPC.

I removed the PC to my workbench and opened up Device Manager. There was a yellow question mark and exclamation mark next to the "Audio device on High Definition Audio Bus" and an entry for NVIDIA HDMI Audio is missing, which is present in another PC that I have using this same exact mobo.

I tried to reinstall the drivers from the manufacturer's driver disk, but the "Audio device on High Definition Audio Bus" still has the yellow marks, and the NVIDIA entry is still missing.

So my questions are:

1) Is the motherboard defective? I still have audio coming out of the "line out" connector, which is the one that is connected to the 2 RCA plugs via a stereo plug to RCA adapter.

2) Does the HDMI cable carry audio and video, or just video? If just video, then maybe I haven't stumbled onto the correct settings yet to get the audio output.

3) If the mobo is defective as far as the "High Definition Audio Bus" is concerned, will a discrete sound card work? And if so, what kind would I need?

Sorry for being long winded and jumping around topics.

Any help and comments are welcome.

Thanks.

Mike

Edited by mikep56
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HDMI typically carries both audio and video signals. I ignore the fact that it carries audio signals and disable HDMI audio on the television menu. I have a similar setup as you where I have HDMI for video and composite for audio with my PS3. I am unaware of the usage of HDMI from a computer. If it is installed properly, maybe it has software where you can configure it.

But you say your line-out is working but you aren't getting the line-out audio through your sound system. I would look there instead. Make sure you have the composite cables connected to whatever input "DVD" is.

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Hi Tripredacus,

I am pretty sure that I had the audio cables correct, but I will try again...probably not till next weekend.

Thanks for the response.

Mike

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The nVidia 7050PV/630 chipset has native video over HDMI but does not include audio; there is a signal coming from the realtek sound chip that gives you "digital stereo" on the HDMI. Reinstalling the realtek HD drivers might solve your problem, else install the nVidia drivers again. Set your Windows Sound Mixer to use the digital out (on the HDMI) and you should have sound with video on HDMI without using 2 RCA connectors on your amplifier, just the HDMI. Set the amplifier to HDMI (1, 2, 3, or whatever port you use).

Hope that helps.

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Hi puntoMX,

Thanks for the info. I will try again this weekend and report back.

Thanks again.

Mike

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Hi Tripredacus and puntoMX,

The solution is simple and as is so often, a human screwup.

The line out audio goes to the audio input jacks labeled SA-SA/CD on the multimedia receiver, and DVD is selected as the video source and SA-SA/CD as the audio source, and all is well.

Thanks for both of your responses.

Mike

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Why not use only HDMI? One cable, less fuzz, digital video and sound.

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Why not use only HDMI? One cable, less fuzz, digital video and sound.

For my case, sound from TV not so good. Receiver doesn't support HDMI port. :P

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Hi puntoMX,

Quote from original post:

"There was a yellow question mark and exclamation mark next to the "Audio device on High Definition Audio Bus" and an entry for NVIDIA HDMI Audio is missing, which is present in another PC that I have using this same exact mobo.

I tried to reinstall the drivers from the manufacturer's driver disk, but the "Audio device on High Definition Audio Bus" still has the yellow marks, and the NVIDIA entry is still missing."

So somehow it appears that the HDMI audio has been damaged on the mobo.

This alternate setup works just fine, and I don't need to trash an otherwise serviceable mobo.

Regards,

Mike

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