His failure of latitude E 6420

My unused laptop 2 months when turned on I have now no sound on speakers, taken helmet, or via the HDMI output on my TV, I have video but no sound. I checked what is obvious, Device Manager reports all works correctly for the sound section. I checked "windows sound" and that's ok too.

Driver see 6.10.0.6324, I suspect a failure of the sound card if so what sound card is used? bit of help and advice please. OS win 7 pro.

concerning

Brian

dumduck
you say that they wrong driver is installed

Brian, I said that's it. Go to the Latitude E6420 html page and scroll down to Audio. The html page displays all drivers available for a given model. There is no 6.10.0.6324 IDT version here. So I searched an IDT 6.10.0.6324 and found his page.  Watching his systems supported, it only shows a couple of Vostro and Inspiron.

dumduck
I went through every folder, subfolder ect twice and there is that anything named ADM.

I downloaded the IDT 6.10.0.6324 (name of file R297811) driver for my computer and unzipped Dell Drivers folder default location (then canceled the installation process). Here is a screenshot of the result showing its WDM subfolder.

dumduck
The original HD has been cloned on an SSD that I used for about 8 months with no problems until now and this problem of his frustration I returned the original HD, but who showed the same noise problem. There may be a failure of the device on e M/B.

The reason why I mentioned the performing a recovery of the system is that it is an excellent tool for diagnosis, because it contains a known good configuration that has audio work, so that if the audio does not work when tested immediately after a system recovery, you know that there was a hardware failure. If your laptop was audio job by the time you removed the original hard drive, then replacing the hard drive in the laptop computer of origin is equivalent to perform a system recovery - in the sense to use it as a diagnostic tool to determine if there is a hardware failure. So if you tested audio immediately after the installation of the original hard disk, before the updates and others could change the configuration, then it suggests hardware failure.

dumduck
But why device manager state all works well?

Device Manager is not a hardware diagnostic tool. When he says a device works fine it mainly means that a driver is installed for the device and appears to communicate with her. If a driver refuses to install then it is a symptom that the appliance is damaged to the point that the driver cannot identify or contact him.

I don't know why your system is saying that the IDT 6.10.0.6324 driver is the suitable driver for your model, or why you can't remove it, or why it does not appear in your Dell Drivers folder. I don't think that anyone would be caused by a hardware failure.

I know you said a few times that you tried all my advice with "no joy". Does this mean that you were not able to test the native driver or you have installed the Windows native driver there but still no sound? If you hear no sound with the native driver which would also be an indication of hardware failure. However the only 100% for sure test is to perform a system restore.

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