Question about HP Media Center m7250n (ED842AA) PC Desktop

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Doesn't recognize when headphones are plugged in

I know the headphones work for a fact because they work in other things. but when i plug them in the computer it doesn't do anything and the sound just comes out of the speaker. i have to then leave them plugged in and restart the computer for them to work. it gets annoying. any suggestions? thanks.

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  • skypirate May 11, 2010

    What kind of headphones are they?

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I dont know just regular headphones... we've had numerous ones. but they only work if you plug them in and then turn the computer on. not while the computer is on

Posted on Jan 27, 2008

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Posted on Jan 02, 2017

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Sorry, but you are asking the impossible thing.
Headphone sockets are made, to mute the main sound on every device they are on, when something is inserted.
You can't change that by plugging in anything else. The only way around is a tech who opens the TV, and does a modification internal. He / she must know what to be done, or else the TV will be damaged. I think I could manage it, but Sorry I don't do house calls. Only from my home behind the computer.

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First, try plugging in different headphones. If those work, then your headphones are broken and you need to replace them.

If those don't work, then please check to make sure you're not plugging them into the microphone jack - you'll see two identical plugs, usually the headphone one is marked with a pair of headphones.

If you're plugging known working headphones into the correct port, then your computer must logically be the broken thing.

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Firstly, it looks like the plug showing in your video has 3 black bands on it. Is that correct? If so, that usually indicates that it would be a headset that also includes a microphone like the kind of device to use on a cell phone that has that kind of female plug on it. I would try to determine where the problem originates, the computer or the earbuds. You could do this by plugging in a pair of known working headphones in to the computer and see if they work ok. I took a pair of earbuds of my own that have the 3 black lines on the plug (and they do in fact have a microphone too) and plugged it in to my laptop and they work fine. The fact of the 3 black lines does not seem to have any effect on whether or not sound comes out of both buds. so, I would take the "broken" earbuds and try them on an mp3 player, someone else's computer or anything else like that that plays stereo music. If you only get sound from one speaker while they're plugged in to a different device then you can safely assume that the earbuds are broken. Most likely a bad wire in my opinion. It's probably time to head to the store at that point and pick up a new pair of earbuds. Thankfully, they're not very expensive these days. I hope that helps. any more questions? you can email me: davidsfreud@gmail.com

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Hi, I apologize in advance for not offering a solution. Have just trolled through the handbook (on-line) for anything that might offer a clue. It takes both high and low impedance units so that's cool. They say to use the phones to assist with speaker issues and there's nothing to suggest that any of the settings affect them. Depending on the impedance the volume levels can change a fair bit so I guess you've cranked it up to check. The fact that they turn off the speakers doesn't add a lot, it can often be a simple mechanical switch in the socket when the plug is inserted. Does the 'speaker off' indicator come on when you plug them in. The only other things I'd suggest is both try another set of phones regardless and the other is reset all the sound settings to factory and see if that has any affect. Else you likely have an issue with the phone interface circuitry.

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