Satellite L755 - audio just stops working after running any program

Hello,
been updating drivers two weeks ago. bios mostly, the rest just refused to be installed, and after a while any software i been running , just shuts down the audio after 1-4 minutes. i am not sure if it has any connection but the usb , any of them, wont supply power to my cell phone and that happen along side to the audio issue.
I tried removing drivers and installing again but it didnt help. did the same with the software that related to the issue as well, but ... Nada !
Been investigating on google for hours and saw tons of this exact problem.
Any solutions?

Did you ever try to reset the notebook back to factory settings using the Toshiba recovery disk?
If driver update or reinstallation did not help in the past and you have no idea how to fix the an particular problem, its advisable to run perform system recovery.
However, I think you should also try this workaround:
First of all uninstall the sound driver.
You can do that in device manager. Expand the area Audio, Video, Game Controller and uninstall /delete the sound driver (Conexant).
Delete also the High Definition Audio Controller entry (Intel and probably nVidia)
Then reboot the system.
After the reboot, the deleted / uninstalled devices should be recognized automatically by Windows system. After that you could test the sound again

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