ATI HD3470 Mobility HDMI Audio output not working!!!

Solarstarshines · 01 Jan 2011

With HDMI enabled on any ATI card first you must have the TV set to HDMI and it must be on it will not detect a signal if you just switch to HDMI and the TV is not on also it will loose signal if you shut the tv off so .........

after you make sure tv is on swtich to HDMI INPUT/OUTPUT then disable onboard sound and enable ATI HDMI sound then you will have sound and connection and the feature of the enable disable sounds are in the playback right click on the sound icon

as far as the connection breaking use the power saving feature to turn the monitor off through windows like you would do a VGA monitor then you won't have connection breakage I hope this helps you all with you're issues and if your not sure about the power saver plans here is what it looks like

this is a old post wow i thought by now you would have fixed the issue you try a newer card ?

Rodney1 · 01 Jan 2011

Hello

I had intermittent detection of the HDMI in "Control Panel/Sound", and eventually no detection (the following solution may also work for those who were never able to obtain a signal at all). For me updating the audio driver fixed the problem. You can update the audio and video drivers by following the steps below (found these steps at Microsoft website). My computer is only 6 months old, but still needed the drivers updated. No special system setting are required as written in previous posts, if the driver is the problem. I was also extremely frustrated with the ongoing problem and hope the driver updates work for you. Good luck!

Open Device Manager by clicking the Start button , clicking Control Panel, clicking System and Maintenance, and then clicking Device Manager.* If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
In Device Manager, locate the device you want to update, and then double-click the device name.
Click sound video and gaming controller
Open each audio controller in sound video and gaming (one at a time) and update by Clicking the Driver tab, and then click Update Driver and follow the instructions.

romadstud · 15 Mar 2011

I have the same issue, I have uninstalled my graphics and my chipset drivers, re-installed them and still no speakers plugged in as per my notifications. I tried unplugging my TV and replugging in, no found hardware sound. I have a high end graphics card, up-to-date drivers, but still no sound. Still says ATI HDMI Output not plugged in, no sound through my TV. Any ideas? I tried the troubleshooting mentioned in this thread, and no joy.
Please help...

Thanks

ATI HD3470 Mobility HDMI Audio output not working!!!

This worked for me