[Q] [HELP] Nexus 4 screen black out after calls! - Nexus 4 Q&A, Help & Troubleshooting

Hello guys! After a long search on the recent questions in this amazing forum I couldn't find anything similar to my girlfriend problem...
Her Nexus 4 was just fine until the update to 4.3.. After that it started to show a problem during/after calls, the screen turns black completely (even when is not near the face or anything) and its impossible to do anything with the phone after that. Power button doesn't work, and there is only two ways to get the phone working again: the other person hang up the call.. or to hard press the power button until the restart...
I tried already to change for a 4.3 ROM and now I changed it to a 4.2.2 ROM... any idea or suggestions to a possible solution?
Thanks a lot guys!

I too recently had this problem. There was a simple fix after dealing with it a couple of days. My 4yo daughter had been playing with my phone after which I started having the problem. What I found was one of her hairs had become stuck in the bumper and was resting on the screen over the proximity sensor. Once I cleared that, no more problem.
The sensor is on the upper left of the screen.
Sent from my Nexus 4 using Tapatalk 4

If You use screen protector and it goes over sensors, than will be the reason of Your problem. Just remove it.

It could be the 4.3 update. I didn't have any such issues until the update and then they began. AndroSensor confirms that no matter what, proximity sensor is at 0.
Any thoughts on what to do short of RMA?
--Dan

I can assure you its your screen guard that is creating an occlusion for your sensor on top left. Remove it and it will definitely work.

vasusharma.28 said:
I can assure you its your screen guard that is creating an occlusion for your sensor on top left. Remove it and it will definitely work.
Click to expand...
Click to collapse
Not sure if I mentioned it earlier (perhaps in another thread) - no screen guard. That wasn't the issue. Finally, I changed the proximity sensor itself, all bueno. No RMA which means avoiding a bunch of hassles (namely new phone, data xfer, etc).
--Dan

Related

[Q] Bug during call, please help!

Hello! I have recently installed CM9-20120319-NIGHTLY-jordan on my Defy and it seems there's a problem during calls. The proximity sensor is not working (when I'm taking the phone from next to my ear, the screen won't turn on, as it used to before in the CM7). Also, the screen remains black and won't turn on unless the other party hangs up the phone. I need some help about how should I fix this. Thank you!
florinjax said:
Hello! I have recently installed CM9-20120319-NIGHTLY-jordan on my Defy and it seems there's a problem during calls. The proximity sensor is not working (when I'm taking the phone from next to my ear, the screen won't turn on, as it used to before in the CM7). Also, the screen remains black and won't turn on unless the other party hangs up the phone. I need some help about how should I fix this. Thank you!
Click to expand...
Click to collapse
Ok, I know this is really old, but I just had the same problem and want to document how I fixed it cause this is a top search result for me and I figure it must be for others too. I had observed this behavior just after installing Quarx's CM11 Nightly, and I had assumed that it was a software glitch.
Some months ago I actually managed to crack the glass on my phone, and I had ordered replacement parts. I thought I had just ordered glass, but I got a whole new case that was all shiny and new. So I swapped broken parts for new and went on my merry way. But I did notice that the volume down button was sticky, but I just dealt with it for a while. Recently when I was Rooting and installing CM11, I got frustrated with my volume down button trying to get into the recovery system, so I cracked my case open to take a look at the sticky button. I found a small plastic burr left from the molding process. I sliced it off with a razor and reassembled and thought nothing of it. Happy with my functioning volume down button I proceeded along my merry way.
Now, why was this detail in the story important? Because in between Froyo and CM11 I had inadvertently caused my proximity sensor to malfunction, by tightening the screws too tight when I put it back together. It wasn't CM11; it was me. The fix was easy. Pop off the battery cover and loosen one screw a half a turn at a time until the proximity sensor started working. Pro Tip: Dial into voice mail while trying this so you can have an active call without hassling your brother.
I only know this now because I found this video:
[Achievement Get: Thread Necromancy]

Problem with proximity sensor

Hello,
I just got my nexus 4 yesterday. I have one major problem, when I'm having a phone call, I am not able to turn on the device (to check anything in the phone or even to close the phone call!). If I click the power button, the screen turns on and off instantly as if something is getting close to the proximity sensor.
How can I fix this? (I'm thinking if there is a way to disable the proximity sensor during the call?)
Nexus 4 16GB running stock 4.2.2 (latest)
Do you have a screen protector on it, without the sensor cutout?? i use to have the same issue...but later found out it was due to my screen protector
ugotproblemz said:
Do you have a screen protector on it, without the sensor cutout?? i use to have the same issue...but later found out it was due to my screen protector
Click to expand...
Click to collapse
I do have a screen protection.. I placed it to align perfectly with the camera hole. It's made to be on the sensor so I figured it should not interfere. I'll try cutting a part of it to test.
Problem fixed after removing screen protection. New problem: I need a screen protection now.

[solved] Screen Blacked out after making a call?

Hello,
I have the i9505 and i have flashed it with [ROM]【4.4.4】Google Play Edition 07-17-2014 - Pure Nexus Edition build now available by @Danvdh and i absolutely love this ROM and works like a charm but there is one thing i am having issue with and i cannot say its a bug as looked over his thread but no one has mention it. i can comment or post in the developer thread due to the number of posts i have, however i come here to ask for help.
When I make a phone call, my screen goes completely black and when i try wake the screen up, it would take multiple times and sometimes i have to take the battery out. The call somehow runs in the background, so if i managed to wake the phone, i have to pull the notification down fast to hang up and this is pain in the neck.
I suspected it could be the proximity sensor in my phone, i have no cover or screen protector, i cleaned the screen and still the same. so i ran few tests to check the sensor. phone detects the sensor but it doesn't do anything.
Thank you in advance
after many research, i have found the issue and its fixed.
http://forum.xda-developers.com/showthread.php?t=2569141
you will need to reset the proximity sensor depending on the values. i can say all working now

[Q] HELP! Phone has black screen when calling people.

hi, i recently got a new screen for my phone since i broke it. i called my friend to give him the good news but when after i dialled his number the screen went black. i would have to either press power multiple times or shut off my phone to get it back to normal. what do i do to fix it?
Do you have a screen protector?
devinwifi said:
hi, i recently got a new screen for my phone since i broke it. i called my friend to give him the good news but when after i dialled his number the screen went black. i would have to either press power multiple times or shut off my phone to get it back to normal. what do i do to fix it?
Click to expand...
Click to collapse
it is a common issue with after market screens and it has to do with the proximity sensor.
check this video on YouTube "Nexus 4 Disassembly Teardown - Screen & Case Replacement - Drop Test Repair LG E960" -- sorry I am not allow to post links yet
if you follow the steps on that video with regards to the proximity sensor, it would be installed correctly and the holes would line up perfectly between the gasket and sensors. However, that doesnt seem to work, you want to now install with the tab facing the other way, you will now see that the holes do not line up correctly and the gasket is partially covering the sensors, dont panic, that is what you want it to look like. This worked for me and for many others.

Always on 2nd screen in the dark issue ??

I bought a used V20 with a defective screen. I change it, everything work for fine, but i notice a strange behaviour with the second screen.
The second screen is always on and i can unlock it by only touching the finger print sensor. BUT at night (or in the dark), the second screen turn off and i need to press 2 times on the power button to wake the phone.
The Knock On feature doesn't work too in the dark.
The light sensor seems to work correctly.
I would love to post a video but i can't......
This is an issue or it is normal ??
Thanks for your help !
Sounds like Doze.
I don't find anything related to Doze or "standby" about this screen.
check "daily timeout" on Show when main screen off. Seem u turn this function on at night
David_26 said:
I bought a used V20 with a defective screen. I change it, everything work for fine, but i notice a strange behaviour with the second screen.
The second screen is always on and i can unlock it by only touching the finger print sensor. BUT at night (or in the dark), the second screen turn off and i need to press 2 times on the power button to wake the phone.
The Knock On feature doesn't work too in the dark.
The light sensor seems to work correctly.
I would love to post a video but i can't......
This is an issue or it is normal ??
Thanks for your help !
Click to expand...
Click to collapse
thophan1975 said:
check "daily timeout" on Show when main screen off. Seem u turn this function on at night
Click to expand...
Click to collapse
Don't seems to change anything
Could it me the last security update ??
I reset the phone today and same "issue"
David_26 said:
Don't seems to change anything
Could it me the last security update ??
I reset the phone today and same "issue"
Click to expand...
Click to collapse
Sounds like there is an issue with the proximity sensor (not light sensor).
It's setup to turn the second screen off as well as disable knock on if the phone is in your pocket. Even during daylight hours if you put your finger within an inch of the sensor when the main screen is off, it should trigger it.
It seems your sensor may just be messed up.
David_26 said:
Don't seems to change anything
Could it me the last security update ??
I reset the phone today and same "issue"
Click to expand...
Click to collapse
There are a few apps on the play store you can try to fix it if you are rooted. You could also try a sensor app to see if the proximity sensor is showing feedback properly although you might need to be rooted for the apps to show the proximity sensor properly (not sure). My note 4 had a hardware test in the service menu not sure how to do it on V20 though.
Same Issue
Edit: Resolved the issue. Please read this post. There is a small rubber gasket-type thing that sits in the hole of the phone's frame where the proximity sensor is positioned. That rubber gasket was not included with my replacement screen. I pulled the rubber piece out of my original, broken screen, and installed it into my replacement screen. I am no longer having issues with the phone in the dark.
I am experiencing the same issue. I have a T-Mobile LG v20 (H918) and I cracked the screen last week. I ordered a replacement LCD assembly and installed it myself. Everything works fine during the day or in a well lit room, but at night, in a dark room, I experience all of the issues you are reporting. I am finding other posts online with our same issue, but as of yet, no resolution.
Even though the second screen is set to always be on, at night, in a dark room, it turns off almost immediately after locking the phone. It is almost as if the phone is in a "deep sleep" or something, because the following also occurs:
Knock On will not wake the phone
Fingerprint sensor will not wake the phone
Even connecting to the phone via AirDroid / AirMirror the phone doesn't wake
Need to press the power button multiple times to wake phone
Providing a light source immediately turns on second screen and resolves all issues

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