Member Avatar for chrisbrunke

I just built an HTPC using the Asus AT3IONT-I motherboard which has onboard CPU and GPU. The board is supposed to be HDMI ready, but I am getting no sound through HDMI to my TV. I know the HDMI cable and my TV settings are fine, because I can get sound using my laptop perfectly fine. All drivers are up to date, and I even flashed the BIOS. I have been into the audio settings in control panel and HDMI is set to default. When I run 'test' in audio device applet, the green bar moves up and down, which shows me that my system is registering the sound. All of the volume controls are set to max settings, and the speaker at the bottom right of the desktop shows HDMI at 100%.
I have searched Google, and MANY other forums, but I haven't received a straight, useful answer. Everyone else's problems are either driver related, or they haven't set their HDMI to default, or whatever. I have done all that. Any ideas??
Thanks in advance.

  • 3 Contributors
  • 2 Replies
  • 285 Views
  • 1 Month Discussion Span
  • Latest Post Latest Post by rubberman

Dani AI

Generated

Short, practical follow‑ups to the suggestions from and . Some displays do drop HDMI audio, but when the display does accept sound the cause is often one of five less‑obvious things: the HDMI audio driver never bound to the display device, an incompatible digital format, a BIOS/board routing option, an internal SPDIF routing issue (common with discrete GPUs), or an OS/driver conflict. The checklist below focuses on diagnostics that weren’t mentioned in the thread so far.

  1. Verify the HDMI audio driver is present and healthy: open Device Manager -> Sound, video and game controllers and look for the display/audio entry (examples: Intel Display Audio, NVIDIA High Definition Audio, etc.). If missing or flagged, remove the device and reinstall the vendor graphics package (make sure the audio component is selected).
  2. Force a compatible digital format: in Control Panel -> Sound -> Playback select the HDMI device → Properties -> Supported Formats and Advanced. Set a conservative default (2‑channel, 16 bit, 48000 Hz) and disable exclusive mode; test again. Many TVs won’t decode bitstreamed surround or unusual sample rates.
  3. Confirm BIOS/board routing: check for any onboard audio / Azalia / HD Audio option in the BIOS that can enable/disable digital audio routing. On systems with a discrete card the motherboard SPDIF header must be connected to the card for HDMI audio to work.
  4. Rule out OS vs hardware: boot a small Linux live USB and test HDMI sound there. Working audio in the live environment points to a Windows driver/configuration issue; no audio points to TV/board wiring or display limitations.
  5. Useful diagnostics to record: OS version, exact names shown under Playback and Device Manager, and the TV make/model and HDMI input used. Those items let responders target the next fix precisely.

Recommended Answers

All 2 Replies

Member Avatar for vincent5487

do ur moniter there gt the audio input??when i buy my monitor is like this too...no sound when i using HDMI,so check is there a audio input beside ur HDMI there...hope this might help u

Member Avatar for rubberman

It is possible that your monitor does not support HDMI audio. I think this is a pretty new capability (could be wrong about that). In any case, as vincent5487 said, check to see that your sound source on the monitor is set to use the HDMI stream, if you can do so.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.