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Screen Off Issue while on phone

I am having a weird problem. I am on stock ATT with root. If i am talking to someone using my phone....if i put it on speaker and screen goes off...I cannot make the screen on back again. If i click power button the phone gets disconnected. its really irritating bug.
Also if i am using GPS while driving and If i get a call....after attending the call and I am not able to go back to navigation app. it shows me black screen.
These two things are annoying me like hell. Any help is appreciated...

maybe set display to never sleep? esp. while driving? will drain the battery faster, but in the car presumably you would have a charger available...

Are you using a screen protector or case thats covering the proximity sensor? Its one of the little spots in the upper left corner. Where most protectors have a cut out. Anyways, thats there to shut the screen off on the phone when you are on it so you dont accidentally hit any buttons. If its covered it wont allow you to turn the display on because it thinks its next to your face. Either that or maybe your sensor is bad.

Screen not displaying

My HTC Sensation wont turn on... properly.
When booting, i get a black screen. Around the edge of the screen i can see the backlight is on both when just on the battery as well as while plugged in, but i get nothing displayed, just ablack screen. It vibrates like normal when i power on, but nothing, black screen.
I do not belive this is software related however, because for all intents and purposes, the phone is booting just fine. However, nothing gets displayed to the screen.
For instance, when i call it from a different phone, it rings... and because i know where the buttons "should be" i swipe to answer the phone as i would normally, and it answers the phone, and i can hear and use the phone just fine. But again, NOTHING is displayed on the screen, i can only answer the phone, because my fingers know where to touch and slide to answer the phone.
Also, when i boot with VOLDOWN, i get nothing. So it doesnt appear to be a software issue, at least from what i can gather.
Im at a complete loss here, and really have no clue. I am very laman when it comes to hardware. I have opened it up (removed the tiny "void" sticker from a screw head, removed 6 screws, removed the lastic backplate (not the battery cover, the plastic plate that holds the battery), and just generally took a look at it. I really dont know what im doing here, so i havnt really done much further than this. Everything "LOOKS" okay, nothing seems out of place, broken, wires are all attached, it looks fine from what i can tell.
Theres no moisture, theres no residue, there what i couldnt consider excessive dirt or dust or debri (at least anything i wouldnt ocnsider normal after hivng the phone a year or whatever).... so im really at a loss here, and not sure what it could be.
Hoping maybe someone else ran into this problem and has had it resolved... but "search" and "google" hasnt turned anything up..Any help would be appreciate... Thank you in advance.

I just noticed, when i take the battery, an di simply make contact with the contacts, the backlight (the dim light around the edge of the screen, i assuming its the backlight) lights up. Pull the battery, nothing, toch the battery to the contacts, backlight turns on.... without ever pressing the phones power button or nothing. I do not remember this being the case before, and i would assume this would not be normal operation. With the phone not turned on at all (coming from a fresh battery pull), i just touch the battery to the contacts, or put the battery in, the phones backlight i wouldnt think, should come on and stay on like it is, no?

I had similar issue after my phone fell down face on. Had to replace the display unit to get resolved.

[Q] G2X screen not visible

Afternoon all. I know the title might seem like a BSOD post but my situation is different. I've searched but can't come up with anything.
When I turn my phone on, it completes the boot but the screen never appears. How do I know it's on? Three things, the ROM I'm using, Eagle'sBlood I think, has an engine revving theme instead of standard Android chime. Second,the menu, home, back space and search buttons on the G2X body illuminate. Lastly, if I swipe in the area where I think the unlock icon should be, the phone unlocks. If I hold down the power button and wait for the shutdown notice, I can guess the 'Do You want to shut down' and 'confirm shut down' icons and the phone turns off.
I've tried removing the battery, SD card, sim card and rebooting in each variation but with no luck. The phone has been rooted for over a year and so I tried booting into CWM (powerbutton, down volume). I think I'm getting into CWM fully but without the ability to see the screen I can't navigate.
This started happening yesterday. I was listen to Pandora and using a GPS app to track my run. The battery died during. I plugged it in for several hours but haven't seen the screen display since.
Any suggestions? If this is a hardware issue I'll get a new phone but without being able to see the screen, I'm not sure how to diagnose the problem. Other than rooting and changing the ROM, the phone is stock. The issue I had before this is the battery icon doesn't display. It just shows a battery outline with a ?-mark inside. The battery level only shows when the phone is charging and powered off.
Your help is greatly appreciated.
G2X - LG P999DW
Rooted
ROM: Eagles Blood (unsure of version)
maurice

Really sounds like a dead lcd or maybe just the backlights. I don't really know how the backlight works on this phone but typically if there is video but no light you can put a flashlight onto the screen and barely make out the display around the flashlight. Either way it sounds like hardware.

Twitch - Thanks for the reply. I'm not 100% sure what you mean by backlights though. When the phone is on and the screen is not asleep I see lights around the edges but the screen itself is black. For my own knowledge is LCD and 'digitizer' synonymous? I saw another thread describing how to replace the digitizer for $60-75.
I'll try checking it with a flashlight when I get home.
TwitchyEye said:
Really sounds like a dead lcd or maybe just the backlights. I don't really know how the backlight works on this phone but typically if there is video but no light you can put a flashlight onto the screen and barely make out the display around the flashlight. Either way it sounds like hardware.
Click to expand...
Click to collapse
I know there is an opinion thing but what is a good upgrade from the G2x for a non-hardcore user? I rooted and changed the ROM b/c you guys made it so easy to do, not b/c I was looking for the phone to do more than it already does. Up until this, and the battery display issue, and a wifi issue I forgot to mention, I've been happy with the G2x but there is no reason to spend $100+ repairing a 2+ year old phone that I pickup used off CList in Q1, 2012 if I can find something better on the used market for $200
maurice

Yeah I'm not too sure how these phones are set up, I have more experience with lcd monitors and such. But I think it is all in one piece on phones.
If you're looking to upgrade pretty much anything that came after the g2x likely has a lot more to offer in development. Good thing about this phone is everything is an upgrade. I have a samsung galaxy s 4g that's nearly 3 years old and single core but it runs 4.3 like a boss! Aside from GPS...

Flashlight didn't show any screen images. I think the next step is just trying to guess my way into debug mode and connect via uSB to my laptop and retrieve data before dumping the phone or trying to replace the lcd/digitizer. I saw an app mentioned in another post that should allow me to mirror my phones screen on a laptop. We'll see.
TwitchyEye said:
Yeah I'm not too sure how these phones are set up, I have more experience with lcd monitors and such. But I think it is all in one piece on phones.
If you're looking to upgrade pretty much anything that came after the g2x likely has a lot more to offer in development. Good thing about this phone is everything is an upgrade. I have a samsung galaxy s 4g that's nearly 3 years old and single core but it runs 4.3 like a boss! Aside from GPS...
Click to expand...
Click to collapse
Thanks again. Anyone else had this issue?

last chance
Last chance in case anyone has any great ideas. I'll be ordering a new LCD and digitizer (probably don't need both) but would prefer not to spend the coin if that isn't my problem. all suggestions welcome

Hmmm, this an odd and aggravating problem you have here lol. I've ran two versions of eaglesblood, their CM7 version on 2.3.4 and their ICS AOSP version on 4.0.4 and have never heard an engine revving in any boot animation so I'm not sure what rom you're running either. Have you tried the hard reboot? While the phone is on at the home screen (if you think you're there I guess) hold the power button and the volumeUP button and the phone will reboot. I've read on here from a more experienced user before that doing this clears or does something to the caches that makes for a more complete reboot or "reset" of the phone's condition. Try that and see what happens. The only other option I would try to take is to flash a new rom and before doing so doing a COMPLETE wipe (to include format /system) and full instillation of a new rom, gapps and kernel. Can you see any images if you boot into CWM when shining a light on the phone's screen?

Maybe I'm wrong about the ROM. The flash screen shows the android graphic in electric blue and a comet type animation zooms around. During the zooming, the sound is an engine revving. I was using the ROM for 2-3 months before this issue popped up so I doubt it is the cause just wanted to give those more knowledgeable than myself as much info as possible
Pain-N-Panic said:
Can you see any images if you boot into CWM when shining a light on the phone's screen?
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Click to collapse
That's my real problem, I can' t see anything! With the phone on, when I hit the power button and unlock the screen (guessing), the only illumination is the menu, home, back space and search buttons on the G2X body. I can tell from the haptic feedback once the phone is unlocked and I can occasionally guess the proper location to shutdown.
I tried the hard restart (Power, Up) but same result. I've downloaded an app called MobileGo for the computer that displays the phone screen but I can't get USB debugging turned on.
I have noticed another odd issue. With the phone turned on and the SIM card installed, when I call myself from a LAN line it goes straight to vmail. I know the SIM is good b/c I've been using an old nokia candy bar phone with the same SIM while troubleshooting. When re-inserting a SIM card, is there anything the user needs to do for the phone to recognize the SIM? Just wondering if this 'direct to vmail' is another sign of ............something.
Thanks

Sometimes when I take out the sim card my apn gets messed up. Ideally you'd just go into settings and load default apn and it'll work again.

But calling should work.
Seems like a busted screen from everything being described here.
Try connecting to a tv using hdmi... maybe the ROM would allow it to display. Worth a shot.
Sent from my LG-P999 using xda app-developers app

also if you could get airdroid installed on tthe phone you might be able to do something with that. Cool little app that lets you control the phone through your PC using the same wifi network.
Sent from my LG-P999 using xda premium

It's alive!!
My phone is alive, or at least it was.
I followed the directions on the youtube video I found to take the G2X apart and the first thing I noticed was the corrosion on LCD connector. I'd already purchased the LCD so instead of cleaning the old we just replaced it. The new screen worked, unfortunately I couldn't get a signal so we took it apart again to clean off corrosion on all the connectors. I'll let it sit for a few days to make sure everything is dry.
Don't be a fool like me, if you're going to do anything with your phone that might cause it to get wet, especially sweat, put it in a baggie or something. I'll post a follow-up if the thorough cleaning does any good.

I'm pulling for ya man, best of luck!

It works!!
The G2X is up and running again! :good:
Pain-N-Panic said:
I'm pulling for ya man, best of luck!
Click to expand...
Click to collapse
For anyone else that runs across this thread, unless the digitizer or LCD is physically damaged I'd disassemble the phone and check for corrosion before buying new parts. I used the new LCD but that b/c I'm not going through the trouble of returning a $16 item.
Wi-fi still doesn't seem to be working, which is odd. Wi-fi stopped working two months ago, it doesn't even show available networks, but worked for a few minutes when I originally replaced the LCD last weekend. Both antennae are connected but oh well. if I had to choose network vs wi-fi connectivity, I'll take network!
Thanks again for all the help
:good:

Phone face down, rings, screen black...

If I have my phone face down on a counter when it rings, when I pick it up the screen is black. Not off, as I see some light, but basically dark.
I cannot see who is calling...can't get it to display.
This actually happens a lot other times. Just now, for example, I just picked it up, and turned it on with finger print. I placed it face down, and picked back up immediately...screen black.
If I happen to have it on and brush the screen across my side, it will go black.
The ringing is the realy annoying one.
Any suggestions? I'm thinking it has to do with something about the proximity sensor sensing the screen against something...but it should let it come on when it's not against something.

Is noone else having this problem? Every time my phone rings, it turns on but stays black. I never know who's calling unless I answer.
I don't know what to do with it. Very annoying.
Hoping someone has a suggestion.

You could disable auto dimming on your phone. Use Lux from Play store instead.

Planet X said:
You could disable auto dimming on your phone. Use Lux from Play store instead.
Click to expand...
Click to collapse
Do you mean Auto Brightness? If so, that is not the problem. I have it disabled and am using an app for brightness control...not automatic.
I cannot find anything in settings about 'auto dimming'.
Thanks for the suggestion though...

You're right. I mean Auto Brightness, it does Auto Dimming too . B.t.w. I don't have this issue.

Planet X said:
You're right. I mean Auto Brightness, it does Auto Dimming too . B.t.w. I don't have this issue.
Click to expand...
Click to collapse
I'm beginning to think I am the only one.
Another symptom which I am thinking is related. Sometimes when I touch my finger to the fingerprint button to wake the phone, it comes on with that dark screen for just a moment. It feels like the phone is busy, overloaded, or just slow. It will then come fully on. Also seems like maybe it is just in deep sleep and slow to wake up. If I turn it off and back on, it is instant.
I check memory and it always has just under 1.5 GB free.
I don't know what to think, but it is very annoying. I thought about chalking Huawei support, but I'm sureo they'd just say to hard reset.
I do have a lot of apps on the phone, but with that much free memory I wouldn't think that should be a problem.

Another interesting thing related to screen dark: I can have the setting for display to not turn off if no actdivity to 10 minutes, and it still goes off after less than a minute. (Going off is different from the topic of this thread where it is near black/dark, but not off).
I discovered this while trying to use Huawei backup. Thinking of doing a Factory Reset. Instructions say to not lock the screen, so I'm trying to keep screen on w/o my having to hold the phone the entire backup.
This overall topic is making me pretty unhappy with the phone, which I had thought was perfection when I started with it.
sigh...

I finally called Huwaei technical support this morning. They apparently know about this problem, and want me to send the phone back for repair. They expect me to be without a phone for two weeks while this is going on.
It speaks to the reason to not buy phones away from carriers, as anytime I had a problem with my Samsung, they would send out a replacement and then I would send back my old one and I would not have to be without a phone.
Pretty poor .

AN update In case anyone is following this for some reason...
Getting ready to send the phone in, I did another factory reset. I had got to wondering if maybe Gravity Box had been part of my problem. May be the case...not sure. But for now i'm not having the problem. I changed some of the settings on it when I reinstalled. I cancelled the return.

I've had the odd time when the screen is on, but not properly backlit. You can just about make out the screen, but then the backlight seems to rectify itself. It isn't just the Mate 9, but the P10 and probably other phones. Doubtful a hardware issue I'd have thought - rather a software glitch.
The P10 just got an update earlier this week (yet still with April security patches) but my Mate 9 hasn't had an update in months.

Anyone else having this problem?

When I try to pull down the notification bar on the right the screen goes black. Also turns off the always on display. I'm assuming it's something with the Proximity sensor. Tired of all the little bugs and problems with this phone. I’m returning it. Just curious if anybody else is having this problem.
https://youtu.be/moTuJP06JCw

alnova1 said:
When I try to pull down the notification bar on the right the screen goes black. Also turns off the always on display. I'm assuming it's something with the Proximity sensor.
Click to expand...
Click to collapse
No, mine isn't doing that. You might have a dud.

alnova1 said:
When I try to pull down the notification bar on the right the screen goes black. Also turns off the always on display. I'm assuming it's something with the Proximity sensor. Tired of all the little bugs and problems with this phone. I’m returning it. Just curious if anybody else is having this problem.
https://youtu.be/moTuJP06JCw
Click to expand...
Click to collapse
I've had that happen on my Pixel 2 XL. Only once or twice and restart fixed it every time.

It's definitely the prox sensor. Always On Display shuts off when the phone is in your pocket or face down, which is detected by the proximity sensor, so that's totally normal. As far as it happening on the home screen, it seems like the phone thinks you're in a call, which would use the proximity sensor to turn the screen off near your head. I would reboot as @jimv1983 suggested and see if that works.
Are you using a screen protector? Sometimes those can cause issues with the proximity sensor, but usually it just causes the screen to shut off and not come back on during a call as it senses the protector at all times instead of your face.

fury683 said:
It's definitely the prox sensor. Always On Display shuts off when the phone is in your pocket or face down, which is detected by the proximity sensor, so that's totally normal. As far as it happening on the home screen, it seems like the phone thinks you're in a call, which would use the proximity sensor to turn the screen off near your head. I would reboot as @jimv1983 suggested and see if that works.
Are you using a screen protector? Sometimes those can cause issues with the proximity sensor, but usually it just causes the screen to shut off and not come back on during a call as it senses the protector at all times instead of your face.
Click to expand...
Click to collapse
I had a case with a built-in screen protector on it and I thought that might be what was causing it but after taking it off it still did it. Weird thing though once I put it on the wireless charger it stop doing it. Hasn’t done it all day even with case on. Weird. Still thinking about taking it back to Best Buy and swapping it out.

I've had a similar issue where the proximity sensor will not deactivate as long as a call is going (can't hangup, can't unlock, can't speaker phone, can't mute, etc.). I have to wait for the other person to hang up. Get an automated robo-call you accidentally answered....oh well, guess you have to listen to them. I have never been so angry at a phone as I am with this one. Especially as expensive as it is. I absolutely would NOT have bought this phone if I knew ahead of time how aggravating this would be! Thinking of sending it back. BUYERS BEWARE!

tonic1080 said:
I've had a similar issue where the proximity sensor will not deactivate as long as a call is going (can't hangup, can't unlock, can't speaker phone, can't mute, etc.). I have to wait for the other person to hang up. Get an automated robo-call you accidentally answered....oh well, guess you have to listen to them. I have never been so angry at a phone as I am with this one. Especially as expensive as it is. I absolutely would NOT have bought this phone if I knew ahead of time how aggravating this would be! Thinking of sending it back. BUYERS BEWARE!
Click to expand...
Click to collapse
Had this very issue with my pixel XL and blowing on the top speaker grille of dust with compressed air solved it.
But if this is out of the box that sucks. It should not be like that. My pixel was approaching two years when that happened.