S video, f4 key and headphone jack not working

Hello,
I bought this (C771) notebook new about 8 months back. I have been using s video port to connect to my TV. However last month it suddenly stopped working. I have checked my s video cable and my TV s video port using my other laptop and they are working fine.
I am surprised in 8 months itself, s video port has gone bad...OR there is some setting to be done to make it functional again.
Also, I have noticed my f4 ket to switch video outputs is not functional.
Also, the audio output from notebook speakers is very low and the headset jack connection is loose...the pin has to be adjusted to make propoer contact to get the audio out.
Please if somebody can guide me in this matter. Thanks for the help.

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Hi,
It could be either Hardware or Software related, so try the following and let me know.
Download the IDT Audio installer on the link below and save it to your Downloads folder.
http://ftp.hp.com/pub/softpaq/sp58501-59000/sp58517.exe
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DP-K
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You need to visit a website such as iFixit with such a question.

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Hello hye ,Sorry , Red light at my headphone jack gone when i format the laptop.
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Sorry for my ENGLISH
Solved!
Go to Solution.

Welcome to the Lenovo Community !
I am assuming that you did a One Key Recovery and restored your operating system to a like new condition ?
The red light should be OFF when everything is working properly on the your model. If you did the One Key Recovery then the restoration corrected a driver problem with the audio that was causing the red light.
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Hi,
Please use the following instructions to check and fix:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01912228&cc=ad&dlc=en&lc=en&jumpid=reg_r1002_us...
Good luck.
BH
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S video, f4 key and headphone jack not working

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