Integrated microphone randomly stops working

Hi I have a problem with my integrated mic. It just randomly stops working.
It was working fine until a few weeks ago. Then one day suddenly it didnt work. and itl randomly start working again.
One way that it got fixed one time was when i plugged in an external mic i borrowed from a friend and unplugged. after that my integrated mic started working again. the next day it stopped working again.
I have tried everything possible to try and fix it.
- Went to sound disabled/enabled it.
- uninstalled/reinstalled the drivers.
- installed other drivers such as realtek
- used the windows microphone troubleshoot.
- tried configuring the microphone.
- even tried system restore, but i only had like 2 restore points since my laptop is relatively new
Nothing has worked. Can someone please come up with an actual solution to my problem?
My laptop is a dv6-6c50us with windows 7 64bit home premium.
And the sound that my laptop uses is IDT high definition codec.
I strongly appreciate any help i can get with this problem.

Hello relgreg,
Take a look at the troubleshooting steps here and let me know if they help resolve your issue.
Good luck!
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@oluawoderu, @karen5, @M_Holmstroem
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How to locate model number:
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http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c00033108
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Integrated microphone randomly stops working

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