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Screen Going Blank During Calls on YU Yureka

10:30 pm
Yureka recently started receiving the Cyanogen 12 update based on Android 5.0 (Lollipop). The update has however brought a bunch of bugs with it; one of them is the issue with Proximity Sensor of the device which causes the phone’s screen to turn off during an incoming or outgoing call. The issue was there in the KitKat OS as well, but it was a way less common. Anyways, while we expect YU or Cyanogen to push an incremental update fixing the issue, here’s a possible solution which should help.
Issues:
  1. Outgoing & Incoming Calls – Screen turns off during a call
  2. Incoming Calls – Screen turns off as soon as you receive a call making it impossible to even pick up the call.

Fixing the Blank/Black Screen Issue

The blank (or black) screen during calls is caused by the Proximity Senor of the phone. It is a hardware issue with the sensor as its detection is not as robust as it needs to be. Calibrating the proximity sensor manually can fix or at least reduce the occurrence of Blank Screen during incoming and outgoing calls. Follow these steps to calibrate the Proximity Sensor on your Yureka.
This only applies to users who have updated to CM12/Android Lollipop. If you haven’t yet, check the update instructions here.
  1. Open the DialPad on your Yureka
  2. Dial  *#*#7769#*#*
  3. In the proximity calibration screen, tap on StartStart Calibration Yureka Cyanogen 12
  4. Wait a few seconds till it reads Calibration Good (in green)calibration good yureka cyanogen 12
  5. Tap Exit.
Fix for black/blank screen during phone
  1. The problem is caused by the incompatibility of "Adaptive Brightness" and "Color Enhancement" features.
  2. Just swipe down from top of the screen and slide the Brightness slider towards "right" and the display should come back.
  3. Now, navigate to "Settings->Display & lights" and "Turn Off" - Adaptive brightness and Color Enhnacment features as shown below.
    4. Yu Yureka Color Fix
    Yu Yureka Brightness feature fix
  4. This will fix the issue for you.


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