I have a SONY XPERIA Z5 Premium . The problem is the tiny LED notification light doesn't show red light. i have tried various led light management applications from the play store but still ain't working. What may be causing this? Running Android 6.0 Marshmallow


Have you tested the LED through the service menu?

To enter the service menu go to the dialer and paste in the following code



Service tests

and then


The LED should start to blink in green then blue then red. If your led is not blinking red I would suggest your LED is broken.

  • Hey, i have tried those tests....only the green and blue colors are functional. I meant the red color ain't working when it's set Dec 10 '16 at 18:51
  • Then I believe the LED is broken. Can you return it to the store for a refund?
    – kirodge
    Dec 10 '16 at 18:53
  • Unfortunately , the device is a second hand and is not under any Warranty. I thot the led module works as one unit. Dec 10 '16 at 18:56
  • 1
    Well I'm not sure but according to wikipedia "tri-color LEDs contain three different LED emitters in one case. Each emitter is connected to a separate lead so they can be controlled independently." en.wikipedia.org/wiki/Light-emitting_diode
    – kirodge
    Dec 10 '16 at 19:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.