Proximity sensor not working after iPhone 6 screen swap.

"Thanks to all who contributed. I had similar issue with the proximity sensor on iPhone 6s. The ear piece heats up and sensor fails to switch off the screen . I replaced the complete screen from another iPhone 6s with has faulty a board and it's works perfectly. I tried interchanging the sensors. The sensor fails to work on the new screen . The sensor works/screen goes off when I placed my finger on top of the screen but not on the sensor.

Most at times Sensor is not the problem.

Problem : Screen ( most of the screens are the cause)

Solution: Quality Screen / New Sensor"

"Hello every one,

I would like to say that I solved the problem by changing out the sensor. The parts I'm currently using for Iphone 6 are original, so no worries about quality. I have no idea why/what caused the old sensor to stop working as I inspected it very closely with the new part I bought and they were identical.

However, after several hours of changing back and forth I deemed the old sensor broken and replaced it.

Thank you for your tips reguardless and I apologize for my late reply. :)"

"http://imageshack.com/a/img538/4899/Aajq...

The solution works for me!"

"You lot are just about to love me to bits, because I'm going to save a !&&* of a lot of money and grief.

I've checked out the sensor and the cause of this problem and it's none of the answers above.

If you look carefully at the old screen, left behind is a double sided foam where the prox was.

What's happening is as you lever the flex out, no matter how carefully, the foam pulls on the prox such that it damages either the solder connection, or the leads of the actual device.

If it's the solder connection, a quick all round with a rework wand or possibly soldering iron will remake the dry joints and get you working again.

If the leads have broken, game over sadly, you'll need to replace it.

The theory of putting tape around it and it then working isn't to do with light, simply that the tape is putting pressure on the joints and they work again.

Prevention is better than cure though right?

Just before removing the flex from the old screen, simply heat the front top of the glass until it's too hot to touch, be careful not to melt the flex leads!

Leave for 30 seconds

Gently pry the prox out. The foam is now soft, it'll give way easier, making it less likely to damage.

I'm here all week, don't forget to tip your waitress ;)"

This issue happened with a 6s I was repairing and the only solution was to replace the screen. We spoke with our supplier and they said some manufactures have a proximity sensor issues with the 6s screens.