Question about 3Com NBX 2101 Business Phone (3c10248b-us)

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Head set icon on lg mobile phone

I have an lg mobile phone. The phone thinks I've still plugged in the headphone, and the icon has decided to rest there forever, even after unplugging. The audio from speakers is bye-bye. Can anyone please help me with this problem.

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  • 226 Answers

Turn the phone off and remove battery, then get an old tooth brush, dip in methylate spirits, and clean the socket where you plug the head phones in, thoroughly.

could have some liquid damage.

Posted on Dec 29, 2009

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Posted on Jan 02, 2017

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Hi the problem is going to be with the part that you plug the head phones into have a good look and make sure nothing is stuck in their as this can cause the problem you are having.

failing that, the chances are the solder holding the socket onto the circuit board has failed and is causing the phone to think the head phones are plugged in, now this could be an easy fix and just need soldering but their is also the chance it could be the firmware on the phone that has got corrupt and is causing the problem you are having.

the problem is their is nothing you can do yourself about this as it will require soldering and getting the phone flashed and the firmware reset, if this is the case and its the firmware then make sure you back everything up as it will be wiped and the phone reset.

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Head phon simbol


you need to replace head jack of your mobile

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To reset it just reverse what you did before it went out, example, headphones plug in and it comes out real quick now theres no sound, turn off the phone and plug the headphones back in and turn on phone with headset in 3.5mm jack then unplug after phone has fully rebooted and ready for use.Trust this works cause i ve done it a many of time since i hooked it up to my car to listen to music. ps did you know you can change the sound effects under the menu while the music is playing to different types of bass levels.

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You probably plugged a headset that does not have a mic. after you unplug it your phone will think that the head set is still plugged in. these phones are stupid and after you unplug the headset it will still be looking for the mic. Plug in and out the headset rapidly and then your phone will give you a notice saying that there is no mic to the headset. this will fix your problem. P.S. keep insisting, this fixed my problem

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i think there could be a problem with the headphone jack, if it is shorting out, it is manipulated into thinking that there are headphones plugged in when there are not.

solution: turn the phone off, and remove the battery. get an old tooth brush, and get some methylated spirits. and start cleaning the port where the headphones plug into, then let it dry.

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Lock up


Sounds like the ground connection (-ve) to the earphone socket is broken.

When you plug in the earphones, they ground through the control section on the board. Poor sound is another sympton of this problem.

If you have any soldering experience, dismantle the player, and re-solder the 4 connections to the headphone socket.

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