G780 win 8.1 left side of headphones not working

Hello good people of Lenovo Community,
After having been trying for quite a lot of time on my own, I'd now like to ask you for any suggestions regarding the following problem: My earphones don't work properly, however only when plugged into my G780 laptop. Actually if I put the jack fully in, only right earphone works, while the left is dead; if I put in it let's say up to 50% then only left earphone works, and the right is almost dead. I've tried it with different headphones and got the same result everytime. When I use my earphones on other devices (mp3 player, cellphone, etc.) they seem to be working just fine, no malfunction. This occurs no matter which source is being used to produce sound (youtube, bsplayer, windows media player etc.).
I've updated the Realtek Audio Driver - perhaps not 100% correctly - however when I open the device manager and check for update of the sound card driver it says it's already up to date.
What else should I try? Oh, as I said my pc is G780, Win 8.1 64 bit, i7 Core etc.
If anyone could help me I'd be truly grateful,
Pete

Hi Pete,
Thank you for providing the findings, please check the issue in Sound Properties as informed by “Abdul_Ahad” in the above reply, if the issue persists even after that please re-install the audio driver by downloading a fresh copy of driver from our Support Website and while installing the driver right click on the downloaded file and select “Run as administrator” option to get it installed without any error.
If the issue persists again please perform “System Restore” in the computer to confirm the issue, below is the link for the steps to perform “System Restore” in the computer.
System Restore for Windows 8.1
Do post us back if the issue still persists.
Best Regards
Shiva Kumar
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