No audio through HDMI problem while using two HDMI output enabed Graphic Card - AVS Forum
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post #1 of 4 Old 11-08-2009, 08:11 PM - Thread Starter
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Hello, guys:

I am having "No sound through HDMI problem" with my "En9500GT TOP/DI" graphic card. I have checked most of the "No Sound" threads a few hours, but all those solutions or scenarios are different with my situation.

Mother board: Gigabytes GA-E7AUM-DS2H
Graphic Card: En9500GT TOP/DI
CPU : Core 2 Duo E7400 Box (LGA775)
HDTV : Hitachi Wooo L37-X01
Os : Windows 7
The mother board has a integrated NVIDIA GeForce 9400 graphic card, and S/PDIF Pin.

I have done some test as the following:
1, No En9500GT installed in MB, Only integrated GeForce 9400. Both sound and video works Fine through HDMI to TV.
2, En9500GT installed in MB, with integrated GeForce 9400 enabled in bios.
2.1 Video OK, Sound OK through integrated GeForce 9400's HDMI output.
2.2 Video OK, no Sound through En9500GT's HDMI output.
3, En9500GT installed in MB, with integrated GeForce 9400 disabled in bios.
Video OK, no Sound through En9500GT's HDMI output.

I have tried to connect the S/PDIF line between MB and the Graphic card, it doesn't make any difference: no sound, no additional device detected. (According to the S/PDIF pin layout in MB, I think it is the only way to make it connectted, so should be correct)

Now, I need extra speakers connected while playing Game in HDTV, it is inconvenient and really made me feel stupid.

Hope someone can give me some hints on what I am not doing well now.

Best regards,
tss
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post #2 of 4 Old 11-09-2009, 09:08 AM
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Try changing the HD audio setting in your bios to "HD Audio" or "SPDIF Audio", one of the two.

Also, make sure you have the SPDIF set as the default device in the system sound panel, not HDMI. Just right click and go "test" on the devices to figure out which one to use if you are unsure.

I'm pretty certain you will need that spdif cable connected to the video card for this to work. Also check the polarity of the cable. Make sure you've got it oriented the right way.

And lastly, make sure you install the latest drivers for your sound. I'm guessing you have Realtek sound, just go to their website and get the latest drivers.

I've got the spdif pass through working on my EVGA Geforce 9600GT with the special HDMI adapter that passes the signal over the extra pins.
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post #3 of 4 Old 11-10-2009, 09:18 PM - Thread Starter
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Really appreciate your suggestion, thank you mephiska.

Now I think my problem is caused by S/PDIF not connected correctly.

I will do more test later.
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post #4 of 4 Old 11-12-2009, 10:12 PM - Thread Starter
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Finally, my HDMI audio output worked.

The problem is within the S/PDIF connection.
In all, there are two pins (one from MB, one from Graphic Card), and a connector.

MB pins layout as the below:
1* 2
3* *4
5* *6
1, power 2, no pin 3, S/PDIF out 4, S/PDIF In 5, GND 6, GND

Connector 4-pin header:
##**
4321
4 marked as JWT and is empty slot, 3 also empty slot and blocked, 2 has no mark, 1 marked as B33 something...

I didn't understand what the marks in connector header means (JWT B4 B33). But since 4-pin.3 is blocked, the only way to connect is
4-pin.1 ---- MB-pin.3
4-pin.2 ---- MB-pin.5

But the manual states that Connector 2-pin header's triangle mark should accord to the triangle mark in Graphic card, and if not accorded, it may cause the GC card broken.

But this will not work! no matter how many times I checked the bios setting or driver setup.

I finally decided to ignore the warning of the GC manual, plugged the 2-pin header in the opposite direction.

Then ...... it worked...... instead of broken
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