Internal Microphone in Lenovo T400 - Doesn't work

Hello everyone!
Thanks for your attention and reading this thread,
Since I made a rescue and recovery from my laptop, after a while I did it, my internal microphone stopped working, and yesterday with Lenovo online support we did everything in hand to try and solve it but apparently the next step is to take it to technical support and frankly that takes a lot of time not to mention the problems I have with them after it such as lots of missing screws in the laptop frame.
What we did was to test it, uninstall the Conexant driver, download new one, install, update Windows, nothing fixed it.
However, as a suggestion I did another recovery again, but Microphone is still dead.
The external microphone works perfectly.
And since I've been reading that other people have the same problem, from what I can see it just seems to be a Conexant software problem?
I've got Windows 7 Pro, Lenovo T400, High Definition Audio (after I uninstalled Conexant and still no luck with internal microphone of High Audio?) I don't know what other information can be useful to solve this?
Is it possible that a Windows setting is interefering?
Thank you very much for your response,
Sincerely,
Eduardo

Maybe the hardware broke? Get an Ubuntu live USB or live CD and boot into it. Try to record sounds from there.
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

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