HDMI does not recognize TV as display

HDMI is not recognizing the Vizio TV as addiontal monitor. Here are my computer details. I have tried using my friend's laptop which also has a HDMI port and his computer was able to recognize TV as an external monitor. I have tried everything like, (Fn+F4), adjusting the mobility settings etc. None of them worked on my computer. Neither the video nor audio are being detected in my laptop. Can anyone from HP support help with this problem ?
Laptop: HP Pavilion DV6
Product number: WH770AV

Hello @skv_99_99,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how you are not able to connect your notebook to your Vizio TV as an external monitor. Are you able to connect a computer monitor with the HDMI cable to your notebook? Is there an error message displayed with your Vizio TV, or is it completely blank? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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