phone screen will somtimes not turn on (but phone will continue working) - G2 Q&A, Help & Troubleshooting

hi, i have an lg g2 (d800 -att)
i recently started experiencing a problem that when i wake my device the screen will remain black (it does turn on, as in a dark room i cant see the that the backlight is on)
when in this state, i can play with the hw buttons (power,volume), and after a few tries i can get the screen to turn back on again.
this usually happens after some use, and not after the phone was idle.
i am not sure if this is a hardware or a software issue, the screen is obviously still connected because of the backlight,
i actually replaced my stock lollipop rom into cm13, and this problem persists.
did anyone experience something like that before,?
any ideas on what can i do to identify the cause of the issue?

Related

TyTn Screen goes black randomly

A while after I've installed official WM6 somtimes only the backlight turned on when I woke the device from standby. And sometimes the hardware buttons stops working to. When this happends the lights in the green and red call buttons are on, even when I set the telephone in standby. Sometimes when this happends the orange charging light also turns on, and I get a bright blue flash in the bluetooth light(much brighter than the actual bluetooth light).
I've tried to turn of the standby, now the device never get black screen(it seems that the black screen only happends when I wake the device from standby). But still the buttons locks up randomly during the day...
I've tried to soft reset, and removing the battery for a while when the screen turnes black, but this doesn't help. Bootscreen and everyting is black for a while.
Now I've downgraded to official WM5. The telephone was ok for a while, but now it shows symptomes of the same problem.
I'va also tried to remove the SD card before I flashed the telephone, but I still get the same error without the SD card.
Is this a hardware or software problem?
Anyone else have this problem?
Now I've tested to disassamble the phone and cleaned everything with CRC electro cleaner, and I've tried every tips regarding the white screen of death, but nothing helps...
I've also tried with many different unofficial ROM's found on this forum, still no change...
I have the same problem, had it with both WM6 and WM6.1 roms. Just now the device woke up on its own from standby (with a dim backlight) and I was unable to turn it on. Sliding out the keyboard just blacked it out, and I can't seem to bring it back to life.
None of the hardware buttons are working either, and the only way to get it back to life is to pop the battery.
I had the Standby of Death SOD this is when the phone fails to come out of standby with a power button press. This issue only affects some people on some networks. I'm not sure if its a network problem or a software problem but as only a minority of people have it, I suspect its mainly a network problem there is a software solution.
The solution is to change the phone settings band option from auto 3G/2G to either 3G Only (WCDMA + UTMS 2100 in Europe) or 2G Only (GSM + AUTO) depending on your requirements.
Also read this thread http://forum.xda-developers.com/showthread.php?t=540943&highlight=standby&page=2 where the resolution was to get a new SIM.
Obviously this only solves the problem when the crash is because of the sim and/or settings which impact the sim. To rule out a software cause its best to start with a hard reset.

Screen blank on power on

I've had a problem with my E900 since I got it with regards to the screen. I was hoping Mango might fix it but it doesn't seem to have.
Sometimes if I press the power button the screen backlight comes on (i.e. screen goes from off state to powered) but there is nothing on the screen. No amount of button pressing will cause the screen to show anything.
If this happens I have to turn the device off again (backlight then goes off) and try again. Sometimes it can take 2-3 times before it turns on successfully with the lock screen.
I also have this if an incoming call attempts to wake the phone and also alarms too.
Does anyone else have this issue?
I confirm this one popping sometimes. Not that often that it becomes annoying, but nevertheless.
Did you find a solution to this problem? I am experiencing it too and it is very annoying!
I've recently inherited one as well (E900 that is).
The one I have has been dropped, the backlight powers, but no drawing on the screen.
I've disassembled and re plugged everything (bugger stripping down!) but still no luck. I've done a VolUp+Down+Cam+power hard reset, and when I plug into PC Zune says setup needs completing (so it has reformatted) but still no luck.
I cant see anything fried, and no damaged ribbons as far as I can see, any ideas?
I sold the phone a while ago, and never solved the problem. I think it's a firmware issue.
PaulMdx said:
I've had a problem with my E900 since I got it with regards to the screen. I was hoping Mango might fix it but it doesn't seem to have.
Sometimes if I press the power button the screen backlight comes on (i.e. screen goes from off state to powered) but there is nothing on the screen. No amount of button pressing will cause the screen to show anything.
If this happens I have to turn the device off again (backlight then goes off) and try again. Sometimes it can take 2-3 times before it turns on successfully with the lock screen.
I also have this if an incoming call attempts to wake the phone and also alarms too.
Does anyone else have this issue?
Click to expand...
Click to collapse
hi.
What do you mean "somethimes if I press power button"?
Is it pressed with purpose to lock the phone, press it to turn off phone (background slider shows to power off - on Mango and beyond version) or press it accidentally?
Cheers.
So, I did a phone reset. Unfortunately the issue is still present!
Sometimes when I press the power button to unlock the phone the screen is lit, but stays blank i.e. no lockscreen wallpaper, no nothing. The same happens sometimes when I get a phone call - the phone rings and vibrates, the screen is lit but stays blank.
When this happens I have to press the power button to put the phone into sleep mode and press it again to wake it up.
What I found is, when the issue occurs the screen is actually responsive. For example I can slid up and unlock the phone then I hear the unlock "pop" sound. It's just that nothing is drawn on it!
I was wondering if anyone else experienced the same behavior and found a resolution. Also I am not sure if this is a software or a hardware problem. If I could confirm it was a hardware problem I would call LG and have the phone repaired or replaced.
i have exactly the same issue as you, it gets really annoying.
i heard from someone online that the only way to resolve it is to replace the motherboard
billybrown said:
i have exactly the same issue as you, it gets really annoying.
i heard from someone online that the only way to resolve it is to replace the motherboard
Click to expand...
Click to collapse
I am pretty certain this is a hardware issue. I am calling LG tomorrow and hopefully they'll take the phone for repair/replacement.
I sent my phone for repair. Today I got it back, and guess what?!
The issue is still present! It seems, they "couldn't reproduce" or something.
What should I do now?
EDIT: If anyone is interested, here is a video I just captured which clearly demonstrates the problem. http://youtu.be/38kF9RYs_bU
I'm sending the phone back for repair tomorrow with this video attached.
Hey, might not be an issue at all, but in the video, I saw that the two times you were able to get it to go blank you had your finger on or near the proximity sensor. I wonder if there is something that could be the trigger.
Just wondering if you can duplicated it or cause it only when you have the proximity sensor blocked, or if it truely is random.
You are right, it might has something to do with the proximity/light sensor.
On the other hand, this issue occurs even on incoming calls when the phone is placed on a table, screen up and nothing around the sensor.
Today, I visited my local carrier shop and left the phone for repair again. They told me, since this is a second claim they'll run it through the process faster, so I expect to get it back next week.
Will post an update.
UPDATE: My phone was replaced. Yesterday I got a brand new unit, yeah! It was stock wp 7.0. I plugged in my sim and used the phone the whole day, no sign of blank screen issues. Last nigh I installed all the updates (total 5 I think) up to OS 7.10.8107.79, FW 1.0.16.10. Guess what?! Same issue!
I am crushed

Screen not turning on after phonecalls...

My phone has been temperamental lately. Sometimes when there is not enough light in the room, the screen will immediately turn off (I am aware that is supposed to be a feature to combat a false "knock on" while in your pocket - but this is far worse than that. even in dim light). I can also replicate a problem of having my screen NEVER turn back on. All I have to do is make a call, or call voicemail and its like the phone just locks up. cant do anything but hold power for 10 seconds. Ive booted into safemode to no avail.
Only thing left to do is factory reset... but im starting to think its physical issue caused by me dropping it
has anyone had similar problems?
Are you running stock or custom ROM? I've experienced, and heard of many other people having this problem on various 4.4 Roms. I've not had the issue when running stock however.
Sent from my VS980 4G using XDA Premium 4 mobile app
I've been having the same problems recently...so I was running it previously with stock + G2 Xposed, then I dropped it and the screen shattered. Some functionality was lost as you'd imagine, but it was all to do with the screen lacking sensitivity in places (what was left of it anyway). I got the screen replaced and then started having all these problems.
So for me, the screen will sometimes turn off as soon as I turn it on (this can be counteracted by spamming either volume button - not ideal, but it works). The screen will also sometimes turn black after making/receiving a phone call, and though I can still take the call, I can't turn the screen back on unless I either receive another call (this doesn't always work) or just reset the phone with the hard keys. I did a factory reset and this hasn't sorted the problem out at all. I've scoured the net for a solution and haven't come across anything as of yet...

[Q] Screen Turns On Randomly

Hi. I'm having an issue with my Verizon S5 where the screen turns on randomly, sometimes a few times a minute, for no apparent reason. Researching the issue, I found a lot of people said the reason they found was that the charge port was bent slightly and after bending it back it fixed the issue. They noticed the screen would behave when it was plugged in because all the connections were forced into their proper places by the charger. However, mine turns on and off regardless of whether or not it is plugged in. I downloaded Wakelock Detector to try to see if there were any apps forcing my screen to wake up but it only listed a couple apps and processes and, combined, they didn't come anywhere near the number of times my screen was woken up. Interestingly, the same day I noticed this problem, my home button also stopped working. It will not turn on the screen when off and it will not bring me to the home screen when the screen is on. I thought maybe it was occasionally functioning, causing my screen to turn on. However, I have never experienced the opposite issue; I have never been using my phone with the screen on and had it suddenly bring me to the home screen. Also, oddly my screen does not have this issue when I am playing music either through the speaker or via bluetooth. If I have music playing, the screen never turns on randomly. If I pause my music, the issue returns and my screen turns on randomly unless I resume my music.
The fact that it doesn't do it while playing music (either over bluetooth or through the speaker) means it must be a software issue rather than a hardware issue. The fact that my home button stopped working at the same time seems to make it seem like a hardware issue but maybe my home button not functioning and my screen turning on and off randomly are both part of the same software issue? I have attached a screenshot of my current version of Android and other details.
Thanks in advance for any help.
TaintedSpuds said:
Hi. I'm having an issue with my Verizon S5 where the screen turns on randomly, sometimes a few times a minute, for no apparent reason. Researching the issue, I found a lot of people said the reason they found was that the charge port was bent slightly and after bending it back it fixed the issue. They noticed the screen would behave when it was plugged in because all the connections were forced into their proper places by the charger. However, mine turns on and off regardless of whether or not it is plugged in. I downloaded Wakelock Detector to try to see if there were any apps forcing my screen to wake up but it only listed a couple apps and processes and, combined, they didn't come anywhere near the number of times my screen was woken up. Interestingly, the same day I noticed this problem, my home button also stopped working. It will not turn on the screen when off and it will not bring me to the home screen when the screen is on. I thought maybe it was occasionally functioning, causing my screen to turn on. However, I have never experienced the opposite issue; I have never been using my phone with the screen on and had it suddenly bring me to the home screen. Also, oddly my screen does not have this issue when I am playing music either through the speaker or via bluetooth. If I have music playing, the screen never turns on randomly. If I pause my music, the issue returns and my screen turns on randomly unless I resume my music.
The fact that it doesn't do it while playing music (either over bluetooth or through the speaker) means it must be a software issue rather than a hardware issue. The fact that my home button stopped working at the same time seems to make it seem like a hardware issue but maybe my home button not functioning and my screen turning on and off randomly are both part of the same software issue? I have attached a screenshot of my current version of Android and other details.
Thanks in advance for any help.
Click to expand...
Click to collapse
Generally, I'd recommend a factory reset just to make sure whether it is or not a software issue.
If the issue is not solved, return the phone.
Sent from my XT1068 using XDA Free mobile app
Solution Found
I was able to fix the problem so I thought I might as well share. I replaced the circuit board that goes under the home button (cost about 10 bucks lol). This is not the home button and cable itself. If you disassemble the S5 to the point where you can see the motherboard, the circuit board at the bottom with the charge port, capacitive buttons, and home button contact is the one I replaced. Hope this helps others with similar issues get working in the right direction. Be very careful disassembling your S5 if you decide to try this route.

Screen keeps turning off and on + sets brightness to 100

Hey guys,
i have a serious problem, which happens really often lately. like 10 times a day. The screen just turns off sometimes. The touch-functionality is still working. I can feel the fingersensor "unlock" the Zuk Z1, but the screen just stays off. Then i try to press all the buttons and sometimes the screen turns on again. But sometimes it just turns on after some seconds even though I didn't touch it at all.
First I thought that this is a hardware issue, maybe a loose contact. But recently a new problem showed up. The screen brightness just goes up to 100%. I turned off auto-brightness and move the slider. Nothing happens. Restarting always fixes it. But mostly after 1-60 seconds it goes back to normal.
Any ideas what might be the problem? Or what I could try?
I haven't rooted the phone and its the newest CyOS version.
Cheers, Oliver
Perhaps you are using the flipcover with magnetic auto switch off when you close the case?
OlivBlum said:
Hey guys,
i have a serious problem, which happens really often lately. like 10 times a day. The screen just turns off sometimes. The touch-functionality is still working. I can feel the fingersensor "unlock" the Zuk Z1, but the screen just stays off. Then i try to press all the buttons and sometimes the screen turns on again. But sometimes it just turns on after some seconds even though I didn't touch it at all.
First I thought that this is a hardware issue, maybe a loose contact. But recently a new problem showed up. The screen brightness just goes up to 100%. I turned off auto-brightness and move the slider. Nothing happens. Restarting always fixes it. But mostly after 1-60 seconds it goes back to normal.
Any ideas what might be the problem? Or what I could try?
I haven't rooted the phone and its the newest CyOS version.
Cheers, Oliver
Click to expand...
Click to collapse
Thanks for the reply,
I havent thought of that before but it is not the cause of the problem.
1. I have a leather case
2. When I take the phone out of the case the displays stays dark
I just did a factory reset today in the morning and the problem already showed up again. So! annoying!!!! Will send back the device I guess
i have lenovo zuk z1 . actually i am getting a problem in this phone . after locking the phone at every seconds light turn on and get turn off on the display. i saw so much on the setting but i didnt get any setting .
The same problem is being arrising with me..please someone help. what should i do..

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