Proximity Sensor Issue on Samsung A40 After Display Replacement

[lg618]

I'm experiencing two issues after replacing the display on my Samsung A40:

1. During a call, the screen turns off when I bring the phone to my ear, which is expected. However, when I move the phone away, the screen remains dark instead of lighting up automatically.

2. When "Accidental Touch Protection" is enabled, I sometimes get a slider prompt when trying to unlock the phone, which shouldn’t happen.

How can i solve this issue? Thank you.

[Anonomoose]

The slider is intentional.
However, the first issue seems weird. Once a guy comes up and helps you you'll be on your way.

[realaud]

The slider is a lock.  You have to slide the lock open to prove that your touch was not accidental.  That's why it's called accidental touch protection.  Since the proximity sensor is contained within the front camera, has the camera been affected?  Can you still take a selfie? Is the screen locking when the proximity sensor activates?

[lg618]

"Is the screen locking when the proximity sensor activates?"

how can i test this?

as i told earlier, screen shuts down when moving phone near my ear. but its not displaying again after looking at the phone. so i have to push the power button to unlock it again.

[realaud]

If uou have to push the power button or double tap the screen, it's locking. When you push the power button, do you have to enter your PIN/password?

[lg618]

no pin man. screen is locking automatically or goes dark when i bring the phone near my ear.

im forced to unlock it with power button which is wrong. it should automatically show display again. proximity sensor is bugged.

[realaud]

Who changed your screen? Did you do it yourself?  If it was changed at a repair shop, bring it back and explain the issue.   If you don't have to enter your pin (you do have a security lock on your phone, right?) then the screen is not locking.  You can do a diagnostic on the phone to make sure everything is working properly.  The proximity sensor is not tested during the diagnostic. The proximity sensor seems to be located somewhere near the center of the screen.  I thought it was through the camera, but in testing I found that putting my finger directly over the camera cutout does not activate the sensor, but putting my palm over the center of the number pad does.  If the sensor is activating, it is obviously working and connected, it doesn't seem to be releasing the touch protection. The only thing I can guess at is that either something got knocked out of alignment when the screen was replaced, it's the wrong screen for your phone, or the screen is defective.  I know it's an annoyance, but if the screen is otherwise working properly, and as long as you can turn the screen back on manually, you may have to live with that.  You can put in an error report with Samsung through the support tab of the members app, maybe they can determine what's causing the issue.

[lg618]

exactly, it doesnt release the touch/proximity protection. only activates it.

[realaud]

Is the A40 a U.S. model?