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My screen goes blank while making a call

I just bought a Galaxy S from ebay and am facing this problem. Everything works fine on the phone and it doesnt look like there is any water damage. When I try to make a call the screen goes completely blank. I cannot disconnect the phone or do anything since the screen is blank. The only thing that I can do is remove the battery and install it again. Based on my research it seems like its a proximity sensor. I even went ahead downloaded Z-deviceTest and all hardware seems fine. I also upgraded to the official 2.3.3 from Samsung so I dont have a custom ROM, no root nothing! What can it be? Should I ask the seller for a refund or there are any tweaks for it. Any help is appreciated.

mitrals said:
I just bought a Galaxy S from ebay and am facing this problem. Everything works fine on the phone and it doesnt look like there is any water damage. When I try to make a call the screen goes completely blank. I cannot disconnect the phone or do anything since the screen is blank. The only thing that I can do is remove the battery and install it again. Based on my research it seems like its a proximity sensor. I even went ahead downloaded Z-deviceTest and all hardware seems fine. I also upgraded to the official 2.3.3 from Samsung so I dont have a custom ROM, no root nothing! What can it be? Should I ask the seller for a refund or there are any tweaks for it. Any help is appreciated.
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I'm not an expert, but seems related to a faulty proximity sensor indeed...
Sent from my GT-I9000 using XDA App

I am pretty positive that it is the proximity sensor as when I insert the headset calls can be made without the screen going blank. I dont have a screen protector and I tried to put some compressed air to see if that changes anything.

When making a call and the screen goes blank can you cover the proximity sensor for a while and see if its turning on the display? I kinda have the same issue sometimes and covering the sensor would normally do the job.
Sent from my SGS using XDA Premium

Same problem here, seems that plugging headset does the job. It is kind of lose or lose situation, even turning off (any idea how?) proximity sensor would not help as screen would be touched by ear Any other solution anyone? Or some kind of calibration? Check? Most applications from marked I have checked are crashing or showing 5cm from sensor regardless.

how to disable Htc sensation xl proximity sensor?

I have replaced the lcd/digitizer on my htc sensation xl and my proximity sensor has stopped working. Every time i make calls it goes to a black screen and sometimes the battery needs to be removed just to get it to turn back on. i was wondering if there was a way to disable the sensor through the software? or completely replace it?

anyone??

johnwehbe said:
I have replaced the lcd/digitizer on my htc sensation xl and my proximity sensor has stopped working. Every time i make calls it goes to a black screen and sometimes the battery needs to be removed just to get it to turn back on. i was wondering if there was a way to disable the sensor through the software? or completely replace it?
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i don't have any idea about the proximity sensor ,but the same thing happened to me ,when i make a call my screen shuttdown and it comes black ,i tried diffrent roms but nothing changed so i decieded to sale the phone .
i posed a post about that and dont receive any proposition or help ,with you ,we are tree presons suffuring from this bug .
i didn't sale the phone yet but before that i will taste one last possibility who is to flash my phone with Ruu ,until that time i wish you a good luck and if i found something which fix it i will post it here .

i once had the issue with screen protector on, but once i took it off, it worked fine.
definitely gotta be the screen's problem, it has nothing to do with softwares.
maybe you can try this app to disable the prox sensor http://www.androidzoom.com/android_applications/tools/proximity-screen-off_pjwz_download.html
if the app works for u, rmb not to touch the screen when u are making a call.

woshikevin said:
i once had the issue with screen protector on, but once i took it off, it worked fine.
definitely gotta be the screen's problem, it has nothing to do with softwares.
maybe you can try this app to disable the prox sensor http://www.androidzoom.com/android_applications/tools/proximity-screen-off_pjwz_download.html
if the app works for u, rmb not to touch the screen when u are making a call.
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ok ,i will try this app and i will see if the phone respond positively .

I have a HTC Sensation XL and have also found the same issue when replacing the screen, both the speaker and Proximity sensor stopped working. After looking around for a while i found the comments on this site from a guy that obviously has come across the issue often:
psytechrepairs.tumblr.com/page/6
It sounds like a common occurrence that they fail with a screen replacement. I've also found that the light sensor and proximity sensor seem to both be on the same removable replaceable board (some sell it as a light sensor & others sell as a proximity sensor but they are both together):
www parts4repair.com/htc-sensation-xl-sensor-light/
Hope this helps.

I know this is an old thread however I have found a solution which i would like to share.
When replacing the lcd the way to fix the proximity sensor is to cover BOTH parts of the proximity sensor with Scotch tape and color the Scotch tape with a black Sharpie felt-tip pen.
works 100%

Hi,
sorry for posting here after so much time, but I have a problem. I smashed my display and ordered myselve a new one. Once I have changed it, the phone looked like everything is working just fine. Than I noticed that my Google Play Store is crashing, and a few apps were on my phone that I have deleted months ago.
My phone is ROOTED!!!
I decided to flash it again, the problem with crashing Play Store was solved.
After I realized my phone is acting crazy,first when I call someone the display goes black, and I cannot hang up or something. It looks like the proximity sensor failure. And even worse, sometimes the phone acts just like someone was using it, it writes opens apps, just like when someone is using the phone.
Any ideas???

Screen not waking up after call ends or during call.

This started happening about two weeks ago. During a call when I pulled the phone away from my face in order to press the end call button, the screen did to wake up. I could not end the call. This has been happening quite regularly now. The screen simply does not turn on after or during a call. Even if the other person ends the call from his side, the screen on my phone does not start.
I was using the stable version of the official CM7 at that time so I flashed the rom again. Since that did not work, I did a clean installation of Mebitek's CM7 without restoring any backups. But I am still having the problem. I am now using the power button to end the call like a handicap person would.
I think something might be wrong with the proximity sensor or my battery. Since, I have absolutely no expertise of how the phone functions, I seek help from you guys. Please give me some suggestions.

try changing the proximity delay

Flash new rom.

dheeraj (dhlalit11) said:
try changing the proximity delay
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Even i face the same issue, i have tried flashing many roms and even tried installing the Samsung official gingerbread firmware with the odin software.It is still the same, display does not wake up after the call. any solutions pls.....

AW: Screen not waking up after call ends or during call.
Do u use a screen protector? I heard some might cause problems with proximity sensor.

Screen protector and wakelock
Masrepus said:
Do u use a screen protector? I heard some might cause problems with proximity sensor.
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I used to have this same problem. The problem seems to be a combination of the screen protector/case getting in the way of the ambient light sensor and therefore not allowing the phone to accurately measure ambient light, and the phone going into some sort of sleep mode. I usually wipe my ambient light sensor off, and adjust my silicone case to allow the light to come in, but the thing that solved the problem for me permenantly was running the small app called wakelock to keep the system from going into complete standby. I am sure that this solution affects battery life, but I still get 10-12 hours between charges which is enough for me.
This thread talks about a similar problem, and this is where I got the idea to try this fix for our problem: http://forum.xda-developers.com/showthread.php?t=1491223
rodjoo said:
No no no guys.. don't bother with reflashing and stuff, that's not the problem.. I had the same problem and I googled it for months until I've learned its a Samsung wifi hardware related problem and mostly Galaxy devices are affected. Something is wrong when phone goes in standby. It continues to work but you can't wake it and you have to reinsert battery to get it on again.
The solution is to install a tiny app called Wake Lock, it's there on market.. it keeps phone awake even when you lock screen. My phone doesn't shut off anymore and I can finally rely on it. I don't have to think anymore and check all the time if the phone is off and if I'm going to miss a call...
The alternative is to turn off wifi before you lock screen but I think that most of us need wifi on all the time to get mails and messages on time
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Galaxy mini doesn't have ambient light sensor.

My mistake
yackovsky said:
Galaxy mini doesn't have ambient light sensor.
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I am of course mistaken. It is the proximity sensor that is malfunctioning due to the screen protector and case.

dheeraj (dhlalit11) said:
try changing the proximity delay
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Click to collapse
Where to locate that setting?

ProxImity sensor problem

Hey guys so I'm having the following problem, during a call when I put the phone near my ear and the screen turns off, sometimes the phone stucks, what I mean is the after I remove the phone from my ear the screen remains turned Off and the buttons do not respond.. But the call is still working.. I had gueste rom then I changed to cyanogen but the problem is still there...

Unresponsive phone perhaps, because as far as I know, nothing of the sort happened to me ever.
Also, does the screen light up when you end the call...let's say by using power button?
Not likely, but I'll mention anyway, check if anything is blocking the proximity censor - holding habit, cellphone case etc.

Similar issue,any way to disable the proximity senzor?
DrGreem said:
Hey guys so I'm having the following problem, during a call when I put the phone near my ear and the screen turns off, sometimes the phone stucks, what I mean is the after I remove the phone from my ear the screen remains turned Off and the buttons do not respond.. But the call is still working.. I had gueste rom then I changed to cyanogen but the problem is still there...
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Click to collapse
I have pretty much the same problem,the screen remain turned off after i remove the phone from my ear and i can't activate the screen or press any buttons until the other person terminates the call.
I run a proximity test from the Hidden Menu and the sensor detects as NEAR all the time even though nothing is in front of it.
I reinstalled several roms and i still encounter the same issue therefore it must be a hardware problem.
I would like to specify that i don't use a screen protector therefore the senor is not blocked in any way.
Is there any way to disable the proximity sensor completely?is there a application or a setting for that?

DrGreem said:
Hey guys so I'm having the following problem, during a call when I put the phone near my ear and the screen turns off, sometimes the phone stucks, what I mean is the after I remove the phone from my ear the screen remains turned Off and the buttons do not respond.. But the call is still working.. I had gueste rom then I changed to cyanogen but the problem is still there...
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Click to collapse
andreita99 said:
I have pretty much the same problem,the screen remain turned off after i remove the phone from my ear and i can't activate the screen or press any buttons until the other person terminates the call.
I run a proximity test from the Hidden Menu and the sensor detects as NEAR all the time even though nothing is in front of it.
I reinstalled several roms and i still encounter the same issue therefore it must be a hardware problem.
I would like to specify that i don't use a screen protector therefore the senor is not blocked in any way.
Is there any way to disable the proximity sensor completely?is there a application or a setting for that?
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Click to collapse
I have had the same problem, with many roms. I think if you are on some of the ICS roms, you will have to expect some bugs, like this. I am now on Temaseks build 135.1 with his kernel and I dont have any of these bugs. It seems ICS for our P990 is to be expected soon, so try a ROM as close to stock as possible and wait for our ingenious developers to get the last drivers working and you will see a lot of bugs disappearing. I would not recommend you to disable additional hard/software.
One app that has helped me though, with some of the ICS issues, is AnTuTu CPUMaster. A free app in Play and it allows you to set your minimum clockspeed a little higher than standard, I set mine around 400Mhz and it took care of many of the little bugs related to phone not reacting according to expectations.
Good Luck

Have the same problem and man... its a huge pain...
I am on the official CM7 latest release. I used to be on temasek's one and did not encounter the problem. As I can;t change ROMs these days, any quick fix, calibration app that would do the trick? Thanks!

Proximity sensors not working interferes with active calls. Fix?

After screen replacment the proximity sensors don't work for some reason. So now when I get a call I can't do anything, It's just a black screen. I can't use the phone or even put it on loudspeaker. I'm looking for some kind of software solution but can't find any. I tried going though some settings on the phone but I had no luck.. The only thing I can do is end calls with the power button :/ Could anyone help? :fingers-crossed:

There's a very small piece that goes on top of glass screen in between LCD where the proximity sensors are, if not installed your issue may rely on that.
Sent from my XT1096 using Tapatalk

Do you have more information on the piece that's needed? I have the black gasket on, and am still having the same issue. What components are needed for the 2014 Moto's proximity sensor?

rumen_do said:
After screen replacment the proximity sensors don't work for some reason. So now when I get a call I can't do anything, It's just a black screen. I can't use the phone or even put it on loudspeaker. I'm looking for some kind of software solution but can't find any. I tried going though some settings on the phone but I had no luck.. The only thing I can do is end calls with the power button :/ Could anyone help? :fingers-crossed:
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use this app to identify name of proximity sensor https://play.google.com/store/apps/details?id=imoblife.androidsensorbox&hl=en_GB and then try a sensor disabler like this https://play.google.com/store/apps/details?id=com.itsme4ucz.screenoff hope it helps