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iPhone 4 proximity sensor not working after replacing

After replacing the iPhone 4 LCD Screen, the Light Proximity Sensor does not work properly. Changed a new Sensor Flex Cable, but it still does not work. The iPhone 4 Proximity Sensor Not Working problem is very common after repairing the screen for iPhone 4 and iPhone 4S.

What caused this problem? The real reason is proximity sensor flex is old now or don't put the right place, You can clearly see 2 blue holes on the middle top of the iphone 4 lcd glass through light. The 2 holes receive light and sensor from outside, if the hole is not get right place with the proximity sensor flex, it will cause sensor not responding.

To resolve iPhone 4 Proximity Sensor Not Working problem, we find 3 solutions. You can have a try. it is very easy to solve it.

First Solution :

Tear down the iphone 4 lcd assebly, in the front view, find the sensor cable, try to use the black ink pen or marker to blacken the left sensor. This will resolve your iPhone 4 Proximity Sensor Not Working problem. However, this method is not 100% effective, it only can solve some people's phone. If your problem was still not resolved, please check below second method.

iPhone 4 proximity sensor flex cable

Second Solution : Step one - Use a knife to cut a piece of black insulation tape, then cut 2 small holes on the tape (Please make sure the 2 holes can fit the sensor well,and the tape must be black), Step two- Cover the tape you just cut on the sensor flex cable. Make the tape well covering. The Second Solution is always very effective. It can solve your iPhone 4 Proximity Sensor Not Working problem perfectly. Regarding iPhone 4S sensor problem, it is about the same, you can buy a UV foam and paste it on the sensor.

iPhone-4-Promixity-Sensor-Not-Working

Third Solution: You can clearly see 2 blue holes on the middle top of the iphone 4 lcd glass through light. The 2 holes receive light and sensor from outside. Just try to use the black ink pen or marker to blacken all around include the two hole.

iPhone 4 lcd assembly

It is very easy to solve the problem, Good luck to you! any question can contact www.pirorparts.com, or emal [email protected].