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Sony WI-C400 : Light constantly on and purple, won't connect or respond

This question relates to connecting a Sony Wireless c400 BUY NOW to an Apple iPhone 7 BUY NOW

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I am using a Sony WI-C400 and for the past day it has shown the indicator light on (it is purple). I have tried charging it. Resetting it and attempting to go back to factory settings but it seems that the buttons are not responsive. It essentially acts as though it is off but the light is on. Any help would be amazing! Thanks!
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Question by Michael 7:22pm, 31st May 2018

There are 24 responses to this question including 3 solutions and 5 others deemed noteworthy

Chris (Admin) responded : 12:06am, 5th June 2018 (2 years ago)
Does turning on and off work or has it been effectively locked on ? To be sure, you are holding the power button down long enough when you try to force pair by holding the power button down ?


Joe Duban responded : 3:52pm, 9th August 2018 (2 years ago)
My wi-c400 was charged overnight. Now, the light is pink-purple and it won't shut off. Resetting by pushing the power and play/pause? button for 7 seconds does nothing. The power light stays lit and will not connect to my smartphone. What else can I try? What is the SONY phone number or chat link for tech support?

Mike (Admin) responded : 4:06pm, 9th August 2018 (2 years ago)
If you are in the US then you can contact via: https://esupport.sony.com/US/p/select-system.pl?DIRECTOR=CONTACT

Let us know if you get a fix!

Victor Romero responded : 11:33pm, 9th August 2018 (2 years ago)
I am having this same problem and don't know what to do and Sony's tech support kinda just blamed it on me not having a laptop or computer to charge my earbuds on

Joe Duban responded : 8:00am, 10th August 2018 (2 years ago)
I fixed mine. Even though the light was pink and would not shut off, I plugged in the micro usb recharging cable and the light turned RED. I then reset it by pressing the power button and the play/pause button for 7 seconds. I could turn it off or on again. SUCCESS.

Juan (Admin) responded : 12:24pm, 10th August 2018 (2 years ago)
Thanks for sharing Joe! :)

Anonymous responded : 4:41pm, 28th November 2018 (2 years ago)
Same problem.. unable to turn the purple light off. No buttons are responding. Connect it with laptop using micro USB is also not helping. Any other solution?

Sumedh Arun Bapat responded : 5:39am, 1st December 2018 (2 years ago)
I solved this problem too. Reconnected the headset to charger, the light turned Red, then i pressed the start/stop and the play/pause buttons together for 7 seconds and the lights flashed blue and the back to red. Then i removed the charger, turned on the set and it is working again.

Anonymous responded : 9:04am, 4th December 2018 (2 years ago)
Connecting via USB saved the day - thanks

vijay responded : 4:16pm, 1st April 2019 (2 years ago)
I am using a Sony WI-C400 and for the past day it has shown the indicator light on (it is purple). I have tried charging it. Resetting it and attempting to go back to factory settings but it seems that the buttons are not responsive.

Mike (Admin) responded : 4:21pm, 1st April 2019 (2 years ago)
Vijay, the solution by Sumedh doesn't help ? When you plug it in does the light go from purple to red ?

Davidetal responded : 5:43pm, 1st April 2019 (2 years ago)
Thanks for this page.
However, when I plug USB in, the light remains purple and all buttons remain unresponsive.
Thr User Manual only talks about red and blue lights. Help please!

Ankit responded : 8:50am, 14th April 2019 (2 years ago)
Connect the headset through laptop or PC
The red light comes back again and the press the power + play/pause button together it will reset and comes back to normal condition.

Sandip Vast responded : 8:58pm, 4th May 2019 (2 years ago)
Is it necessary to connect USB thru laptop or Pc? I tried above method while normal charging but it doesn't help..

Petersen responded : 10:37am, 14th May 2019 (2 years ago)
I think once your device has this purple light, it is best to send it in for replacement if you have the warranty, or replace it with something else more reliable. I had mine for a few months and it now shows the same signs of not being able to pair and a constant purple light. The first time it happened, my music just died, the lights started flashing, and it won't turn off, and when it did, it refused to charge for almost 2 days. Then it worked for another few days and died again the second time, but I got to reset it. And here I am today, back for the third time with a permanent purple light. Call up your local support center if you want, but since these are already cheap, it is too much of a hassle to get it fixed. If you have these problematic symptoms once, you will definitely have it again later and Sony aren't that responsive anymore, so it's best to find something else instead. For those who still wish to try and fix it, use the Sony USB cable provided, or a good quality cable, and connect it directly to a laptop or PC USB port. Do not use any phone chargers, wall chargers, or USB hubs.

Heinko responded : 5:33am, 19th June 2019 (1 year ago)
I am using a Sony WI-C400 and for the past day it has shown the indicator light on (it is purple). I have tried charging it. Resetting it and attempting to go back to factory settings but it seems that the buttons are not responsive. It essentially acts as though it is off but the light is on. Any help would be amazing! How to do this?Thank!

John (Admin) responded : 3:17pm, 19th June 2019 (1 year ago)
Heinko, the above marked solutions from other readers didn't help ?

Jonny responded : 2:52pm, 25th June 2019 (1 year ago)
I am having the sane problem with my WI-C400.

Blinks blue/purple constantly with 1 second intervals. Cannot pair with device (iPhone). Will not turn off when I press and hold the power button. Will not give power setting when I press power button briefly.

Tried forgetting device with the iPhone, and now the iPhone cannot discover/find the device. Other devices it has never been paired with also cannot find it as an option.

Tried plugging WI-C400 into plug in phone charger AND PC USB; it still wont turn off and stop blinking. Light stays blue/purple and blinking instead of turning to the steady red of charging. Tried pressing "(+)" and "()" buttons together and holding for 10+ seconds anyway (to reset) -- no response.

Cannot think of anything I did to harm it. It was working fine, and then it wasn't. Didn't drop it, hit it, get it wet, or anything.

Dev responded : 6:37pm, 12th September 2019 (1 year ago)
I have the same problem. I did get it to reset once or twice by hooking it to the Laptop. However, it then fails again and is now locked up. Sony is of no help at all. They say it is past its warranty so no way to help. This is a real pistol since my headphones have not been used much, never abused, and it is clear to me Sony knows about this manufacturing or design flaw.

Dustin Blackmon responded : 11:51pm, 30th March 2020 (8 months ago)
I had the same problem and I connected it through USB instead of a 110 outlet and it worked good luck

Vimal Upreti responded : 4:19pm, 15th June 2020 (6 months ago)
unable to turn the purple light off. No buttons are responding. Connect it with laptop using micro USB is also not helping. Any other solution?

sbautista responded : 6:01pm, 20th June 2020 (5 months ago)
i experienced the same issue but still cant find any other solution to fix this issue..

Yugander Babu responded : 7:19am, 27th July 2020 (4 months ago)
My head phone not turnoff purple color. Already I try to time restarted successful but again when I charge the headset and unplug the USB I am pressing power button again glowing purple color sir ....pls help me

Maraj bin ahid (joy) responded : 4:23pm, 28th October 2020 (1 month ago)
Connect with charger it will turn into red then push power and volume down button for 7 sec ..then alll will be ok

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