why wont my sound work on my computer

Thanks for responding to me. so I tried going into the device manager but I really wasn't sure what I was suppose to do when I got there. The instructions said to check for conflicts and when I opened the device manager it did not tell me there were any conflicts at all. I did see Sound, video and game controllers but it didn't say anything about a conflict or anything like that. It then asked me to ensure that my drivers are properly installed and that the programs that I have recently installed are not conflicting with the drivers configurations. I have know idea how to check these things, sorry. Also the last things said to check my sound card which I also do not know how to do.

The only thing I can give you for more information of what was going on when it happened is that it was working and then I left the computer for a while and no one used it or touched it and when I came back to it the sound had stopped working. I do have anti-virus on my computer Avast! and it says I do not have any viruses. I did have a bad virus fairly recently where they had to wipe out the entire computer, but the anti-virus has said I have not had any viruses since then. Do you think these things could be related? Thank you again so much for your help!
Hi I have new Samsung smart tv and my home theaters is LG and I connect them through HDMI cable but sound is not coming How do I get sound on my dansat TV from an HDMI cable connected to my laptop How do i get sound on my TV from an HDMI cable connected to my laptop No sound on laptop headphone jack when connected to TV via HDMI cable Hi there.

Connected TV to cable box via HDMI and get nice picture but no sound. When connect laptop to TV via same HDMI cabl i have samsung TV, but cant connect with my laptop(samsung) but it apparently shows HDMI cable conncted and later shows no sig Can t get sound using hdmi ARC cable connect setup Panasonic home theatre SC-BTT785 to Lg60UH652V smart TV Connecting laptop to TV and to surround sound using HDMI and digital audio cable with some issues I always have my laptop connected to my TV through HDMI. Today, my laptop overheated and shut itself down.

Now I can no longer i have a laptop to tv connected through hdmi which i get the audio fine. i then try to use the mini jack headphone output to VGA port on laptop connected to HDMI cable through converter i ve connected my tv to my pc monitor via an hdmi cable with a hdmi usb adapter to my monitor,but i still can t watch netflix

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