Question about Sennheiser HDR 140 Consumer Headphones

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No sound coming through my Sennheiser wireless headphones

My Sennheiser 140 wireless headphones is not playing any sound. When I turn them on, I just get a loud beep (it beeps 4 or 5 times in a row).

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Turning the transmitter on and off (Fig. 5)
Turn on the sound source. This automatically activates the
transmitter and the green LED “ON/OFF” lights up. If the sound
source is turned off, the transmitter is automatically deactivated
after approx. 3 minutes (the LED “ON/OFF” goes off).
Note: The automatic level control only functions if the volume of the
sound source is sufficient.

Posted on Apr 02, 2009

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Try checking the power connections, on the left hand side, that takes the 2.8 volts over to the right hand side. It would appear that these had shorted out on my headphones and stopped the reciever from working. I moved the wires apart and the headphones started working. I hope this helps.

Posted on Feb 09, 2013

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Posted on Jan 02, 2017

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The volume of the sound source (Mac) must be sufficient, otherwise the transmitter automatically turns off. Turn up the volume on the Mac, and turn down the volume on the headphones. There is no way to disable the Automatic On/Off function of the transmitter.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

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Mine is a bit older (2yrs), but I have exactly the same problem. Absolutely no sound from the headphones (no beeps). I also tried new batteries, but still nothing.

If you have a solution, let me know!

Tanks

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Well it could be interference from the TV, computer, or other 900Mhz device (some wireless routers run on this frequency).

I'm currently dealing with the same issue myself, if I find a solution I'll post back.

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