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I have IDT High Definition Audio Codec installed on my E6420 Dell. When I had Win 7 installed, I was able to direct sound to my speakers. I have the IDT speaker/headphone combination selected as default.

Since I upgraded to Win 10, I am no longer able to get any sound through the speakers (I have the headphone pulled out).

In addition VLC will not play back through the speakers or the headphones.

When I left click on the audio icon, a single slider pot comes up representing the IDT system, but manipulating this makes no difference.

I ran the windows troubleshooter and it fixed some problems, I can now hear Vlc and Skype, and Audacity loaded with no error message, but still no way to get sound through the speakers.

  • Try the windows audio settings by typing audio in the start menu and clicking "Manage Audio Devices". Do you know if your windows 7 was 32 or 64 bit. Same goes for windows 10? This may be caused by drivers, so reinstalling them may also help. – mt025 Aug 5 '16 at 19:27
  • 7 was 64, 10 is Pro, 64 bit. – Xavierjazz Aug 5 '16 at 19:33
  • Try right clicking on the sound card in device manager and clicking "Update Driver Software..." – mt025 Aug 5 '16 at 19:35
  • Did that before, did it again, best driver is installed. – Xavierjazz Aug 5 '16 at 19:37
  • Try an uninstall from device manager. Then click "scan for hardware changes" from the icons in the top of device manager. Windows should automaticly reinstall the driver. – mt025 Aug 5 '16 at 19:39
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Thanks to everyone for their help. I was finally able to resolve this issue by locating this site:http://www.makeuseof.com/tag/no-sound-7-tips-fix-audio-issues-windows-10/

"3. Update IDT High Definition Audio CODEC A number of systems may encounter issues with their IDT High Definition Audio CODEC. This can be fixed with a manual driver update which allows us to choose the sound driver we wish to use.

Right-click the Start menu and select Device Manager. Expand the Sound, video games and controllers section. If you spot IDT High Definition Audio CODEC, right-click and select Update Driver Software. In the next panel, select Browse my computer for driver software, followed by Let me pick from a list of device drivers on my computer. This allows us to select from any drivers pre-installed on our system."

The key was found just below this. It was to do the update in the "Sound, video games and controllers section" rather than the Audio input area.

Again, thanks to all.

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Try downloading an offical dell driver for your audio from here http://www.dell.com/support/home/us/en/04/product-support/product/latitude-e6420/drivers/advanced. Please note dell states that this device is:

Product not tested for Windows 10 upgrade

Dell is not testing or developing Windows 10 drivers for this product. If you choose to upgrade, some features, applications, and connected devices may not work as expected.

  • The drivers on that page are not compatible with Windows 10, there really isn't any sense in trying them, can you perhaps suggest another solution that is more likely to solve the problem for the author? – Ramhound Aug 5 '16 at 19:49
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    I disagree. They are not tested for windows 10, which doesn't mean they are not compatible. I have installed many windows 7 drivers on windows 8, 8.1, and 10 with no issues. – mt025 Aug 5 '16 at 19:51
  • "No driver updates found. Your system has the most recent updates" – Xavierjazz Aug 5 '16 at 19:52

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