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[Q] Screen goes partially blank

Hey, so I have this weird problem with my G Flex 2.
I got it around 40 days ago from U.S. Cellular.
I have run into this problem about three times now, and from what I can remember it always happens when I have music playing. I tap the screen on to the lock screen then let it go to sleep or turn it off myself. When I wake it back up the screen is all black except for a few millimeters on the top, where I can see some display.(*note, this doesn't happen every time)
I am able to scroll through the display but no pop up menus. Since the battery is sealed off in the back of the phone I can't use that fix, holding the power button only brings up the menu option to turn off the screen which doesn't do me much good since I can't use the screen.
If I wait for 5 minutes or so the phone will right itself, but I don't want this to be a persisting problem. I'm not sure if this problem is tied to the music playing, it hasn't happened when it isn't playing, but I play music on my phone quite often. (note* I am playing the music from my phone, not streaming)
If you need more info I'll do my best to provide it. This is all I can think of right now.
Honestly, I don't expect anyone to have a fix yet since the phone is fairly recent and not as popular. I tried looking under G3 forums since the UI is pretty much identical, but I didn't find anything.
Sorry, my post is a little wordy.
I'd appreciate any help anyone can provide. Thanks

Yes, this has happened to me twice recently too. Once the screen was completely black except for a bright white line at the very bottom, but the phone was still responsive behind the dead screen. The other time there was a distorted/ghosty notification bar showing at the top but nothing else (like what you reported). Then the problem would resolve completely and spontaneously after resuming from sleep a few times. I have the Korean model (F510S) which was a gift so I'm stuck with it - no returns or warranty available.
bonebeatz1234 also posted about a similar problem. Seems like a hardware fault?

The replacement phone screen was fine i had a different issue of over heating and had to return it . I opted to get another device the note 4. Didn't wanna go that route bit had no choice i loved the design and ui of the flex 2. I wished lg would of just ditched the 810

~~~
Hi, I encountered same problem here.
Is anyone able to send me a screen shot or a video of this problem.
As I need to use this to prove the situation and claim warranty from the seller, however I didn't take a photo or something when the problem happened to me.
please sent to [email protected] if you have the photo or video and many thanks~

Just had this problem also had a g flex 2 for about 21 days now and it happened to me after a restart in the car with a pinkish line at the top and the phone was completely responsive even though the screen was blank
I think it might have to do with heat cause I held it by the ac vent while I was reading this board on my nexus and when I looked back at the phone it was working perfectly
But I swear during my time with the phone it heated up way more than this time and this time the phone wasn't even hot
I reset the phone like 3 times before I held it to the vent and it didn't help at all
Using the att variant with android 5.1.1

Have the same problem every now and then, found a recommendation on another website and in the instruction manual to reset the phone by holding down the power button and volume down button for about 10 seconds or to turn it off by holding down the same buttons for 20 seconds. I find what works better though is to just leave the phone alone and it corrects itself within about 5 minutes.

Having this same problem. Happens once every couple of weeks. Any updates on this?

I think that this is a heat problem....everytime i left my phone in the sun, it show me this strange error.

I'm not convinced its a heat issue. I looked at my battery chart the last time it happened and it was barely over 90 deg. It seems it happens to me when it is charging PLUS doing something like streaming music or GPS is on. I need to start taking notes. I should have done that before.

this have happened to twice too. weird anomaly.

assyriska said:
I think that this is a heat problem....everytime i left my phone in the sun, it show me this strange error.
Click to expand...
Click to collapse
even you can show some errors if u stay on sun.
Inviato dal mio LG-H955 utilizzando Tapatalk

Having the same random issue. Today it happened and reboot would not fix (it usually does) finally after about 30 minutes the screen came back to normal. I now disabled lock screen in case I need to get data off the phone from pc ? in the case that the issue becomes permanent.
Sent from my LGLS996 using Tapatalk

although it's an old post, but worth to mention, that It can happen to all the LG Flex 2 models.
It is caused by a heat or inaccurate voltage. let me explain how it can happen:
heat - when you put the phone on the car's cradle under the car's front windows during a sunny day - it will happen.
voltage/heat - when you charge your phone and not using your original charger (eg chinese car chargers) - it will happen.
so what to do? I've noticed that putting the device over the cat's air conditioning , can reduce this to few minutes. also, if you can, mount your cradle over one of the air condition outlets and it will freeze your phone all the time

Nexus 5 extremely slow and stutter from boot after screen replacement

Hi, I replaced myself the screen (preassembled screen+digitizer+frame). After the replacement everything worked perfectly for like two hours when i rebooted it, from then on it is extremely laggy and stutters from boot animation, and when I press the power button (or when the screen shuts down), the phone itself shut down. In bootloader it doesn't seem to have problems.
I checked every connection inside the device (I've disassembled ad reassembled it several times).. thinking of a software problem, I've flashed marshmallow stock rom frist, and kitkat 4.4.4 then... but it's the same with any factory image.
Maybe I damaged something on the mainboard?
I also made a video to explain the problem:
with a lot of patience I set up a google account and downloaded cpu-z to see if maybe temperature sensor where giving wrong information to the system, but they're fine and everything seems to work propely aside from the stutter.
thanks to anyone who will help me, I'm almost giving up

RedMaio said:
Hi, I replaced myself the screen (preassembled screen+digitizer+frame). After the replacement everything worked perfectly for like two hours when i rebooted it, from then on it is extremely laggy and stutters from boot animation, and when I press the power button (or when the screen shuts down), the phone itself shut down. In bootloader it doesn't seem to have problems.
I checked every connection inside the device (I've disassembled ad reassembled it several times).. thinking of a software problem, I've flashed marshmallow stock rom frist, and kitkat 4.4.4 then... but it's the same with any factory image.
Maybe I damaged something on the mainboard?
I also made a video to explain the problem:
with a lot of patience I set up a google account and downloaded cpu-z to see if maybe temperature sensor where giving wrong information to the system, but they're fine and everything seems to work propely aside from the stutter.
thanks to anyone who will help me, I'm almost giving up
Click to expand...
Click to collapse
It's probably touch lag from the new screen, u probably got a bad one, contact who sold it to u, get a new one
Sent from my Nexus 6 using Tapatalk

soupysoup said:
It's probably touch lag from the new screen, u probably got a bad one, contact who sold it to u, get a new one
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
I thought of that, but the fact that the haptic feedback (like the one you have entering app drawer, or returning home) is perfectly sync without lags made me think the touch was ok... and even twrp recovery was working smoothly (coudn't show in the video since I factory flashed kitkat)

RedMaio said:
I thought of that, but the fact that the haptic feedback (like the one you have entering app drawer, or returning home) is perfectly sync without lags made me think the touch was ok... and even twrp recovery was working smoothly (coudn't show in the video since I factory flashed kitkat)
Click to expand...
Click to collapse
What about stock Marshmallow?
Sent from my Nexus 6 using Tapatalk

soupysoup said:
What about stock Marshmallow?
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
with 6.0 shuts down after boot animation (and reproduces it stuttered like the kitkat one in the video).
Right after the screen replacement, stock marshmallow was working fine for a while

That's very strange indeed, OK so try this, go into developer setting and check disable HW overlays, and check force GPU rendering, this will make the phone use the GPU for UI stuff, possibly fixing ur studdar, let me kno
Sent from my Nexus 6 using Tapatalk

soupysoup said:
That's very strange indeed, OK so try this, go into developer setting and check disable HW overlays, and check force GPU rendering, this will make the phone use the GPU for UI stuff, possibly fixing ur studdar, let me kno
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
OK, I've just tried... can't tell any differences.
I was thinking that the main way to solve this could be to investigate on the fact that turning off the display (both with power button or by itself after 30sec), shuts down the entire device. Could this be an hardware failure? (maybe generated by a physical damage that I caused)
thank you BTW

RedMaio said:
OK, I've just tried... can't tell any differences.
I was thinking that the main way to solve this could be to investigate on the fact that turning off the display (both with power button or by itself after 30sec), shuts down the entire device. Could this be an hardware failure? (maybe generated by a physical damage that I caused)
thank you BTW
Click to expand...
Click to collapse
That's very weird, what did u replace, and how did u do the replace, did u do the frame as well, and when u took the batt out did it come out easy it did u fight with it, I've heard cases of this happening, and other issues caused by damaging the battery during a fix
PS, no problem man, I know exactly how u feel lol
Sent from my Nexus 6 using Tapatalk

soupysoup said:
That's very weird, what did u replace, and how did u do the replace, did u do the frame as well, and when u took the batt out did it come out easy it did u fight with it, I've heard cases of this happening, and other issues caused by damaging the battery during a fix
PS, no problem man, I know exactly how u feel lol
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
I bought a pre-assembled frame-display-touch. The battery came out easily even if I slightly forced it in the bottom. Anyway before replacement the battery was completely discharged... it has been completely discharged for almost two months since I broke the lcd in September. Left the phone disassembled on the desk for two days. After reassemble I plugged in a 2A Samsung charger to fill it up... initially everything was working properly, made a few photos with both cameras to check, a call and some random checks.. still on charge. On the second call I made, the microphone stopped working, so was the third... turned off the device, back on and everything was messed up like it is now.
Well a battery failure could actually make sense...
Inviato dal mio SM-T805 utilizzando Tapatalk

hey i have exactly the same problem with my nexus 5, i haven't opened it neither changed battery or screen but i'm suffering the same issue since a few days ago. have you managed to find a fix?. in my case it just started to do that suddenly. as in the video is totally unusable, i reinstalled latest stock firmware throught the recovery menu but with no luck, everything is ultra slow now
RedMaio said:
I bought a pre-assembled frame-display-touch. The battery came out easily even if I slightly forced it in the bottom. Anyway before replacement the battery was completely discharged... it has been completely discharged for almost two months since I broke the lcd in September. Left the phone disassembled on the desk for two days. After reassemble I plugged in a 2A Samsung charger to fill it up... initially everything was working properly, made a few photos with both cameras to check, a call and some random checks.. still on charge. On the second call I made, the microphone stopped working, so was the third... turned off the device, back on and everything was messed up like it is now.
Well a battery failure could actually make sense...
Inviato dal mio SM-T805 utilizzando Tapatalk
Click to expand...
Click to collapse

pyroxine said:
hey i have exactly the same problem with my nexus 5, i haven't opened it neither changed battery or screen but i'm suffering the same issue since a few days ago. have you managed to find a fix?. in my case it just started to do that suddenly. as in the video is totally unusable, i reinstalled latest stock firmware throught the recovery menu but with no luck, everything is ultra slow now
Click to expand...
Click to collapse
I didn't fix it eventually... but from my experience in fixing PCs, I believe that it could actually be a power issue related to either the battery or some power circuit.
If you've nothing to lose and some dollars to spend, you could try a new battery and see if it works!

Galaxy S6 Overheating after OTA update

Hi There,
This is the first time i've been so stuck i need to ask for help, so here it goes:-
my wife has a Galaxy S6 (sim free G920F) for around 25 days, Last night it prompted for an OTA update, which we allowed however today, all it is doing is complaining about Overheating and it needs to turn off, when putting it back on charge it says battery temp is too hot after it is left for a bit unplugged you can plug it back in and it will charge, but the error returns. saying it is too hot.
all since the OTA update
it currently on stock 6.0.1
I've tried to clear the cache and do a factory reset. but neither have resolved the problem.
anyone else had this since the update?
Many Thanks
Paul

Most likely culprit is the fast charging feature. Try disabling it and see if that resolves your problem.
Settings » Battery, disable fast charge
If that fixes your problem I'd say try a different cable and charger with quickcharge support.
You can also try turning phone off then trying to charge.
If it still gets crazy hot I'd say your battery is quickly going bad and you should get it replaced.
If it works fine without quickcharge at least you narrowed down the issue.

blandead said:
Most likely culprit is the fast charging feature. Try disabling it and see if that resolves your problem.
Settings » Battery, disable fast charge
If that fixes your problem I'd say try a different cable and charger with quickcharge support.
You can also try turning phone off then trying to charge.
If it still gets crazy hot I'd say your battery is quickly going bad and you should get it replaced.
If it works fine without quickcharge at least you narrowed down the issue.
Click to expand...
Click to collapse
its not on fast charge when it occurred, still having same problem TBH I think its a borked update, anyone else having the same after the OTA update on stock 6.0.1?

zanthraxuk said:
its not on fast charge when it occurred, still having same problem TBH I think its a borked update, anyone else having the same after the OTA update on stock 6.0.1?
Click to expand...
Click to collapse
Just power off device, then press power+vol up and home button. When you see samsung logo relase just power button. When you enter in recovery just navigate to wipe cache partition and confirm with power key then reboot device. This is good for device after ota update, battery drain problems etc
Sent from my SM-G920F using Tapatalk

What happens when you power the phone off completely and plug in charger?
See if it'll fully charge, this will rule out software / os issue.
Better to find this out first before your left with a dead phone for a couple weeks I've been there.
Sent from my stang5litre Edition 5.0 using XDA Free mobile app

Hi
It happened to my galaxy s7 and my friend's galaxy s6. Both in exact same time (after update)
After update devices start to overheat without a reason during normal usage (Web browsing etc).
And I mean really hot - this kind of temperature that makes me worry about hardware.
The weird thing is that even that I flashed previous ROM (downloaded from sammobile and flashed with odin) the problem still occur. I thought that wiping all data and cache and flashing a ROM should totally remove any change that has been done to device by update, but it seems like I "can't go back" to the state from before the issue.
I searched the whole Internet looking for that issue hoping that some people already started to complain about it and by this - confirming that this is a larger problem related to update. Right now this is the only topic that I found.
Could be that people are still not aware that their recent problems with overheating is not because of some crazy app lagging (that's what my friend first thought was).
In addition when you try to Google the issue you got 102910 tutorials about how to resolve overheating by disabling fast charge or not using phone in the sun... lol.

Strange. One possibility is that the temperature sensor(s) inside the phone are defective and reports inaccurate temperature readings. I had this problem with my ex-HTC One X+, it would report high temperatures when in reality it's nearly ice cold (during the winters), I had the service centre replace the sensors for me.
My S6's battery temperature never exceeds 40°c, while the CPU occasionally reaches 70°c, at that point, my S6 would perform an automatic soft reboot. But that's it though.

DaryllSwer said:
Strange. One possibility is that the temperature sensor(s) inside the phone are defective and reports inaccurate temperature readings. I had this problem with my ex-HTC One X+, it would report high temperatures when in reality it's nearly ice cold (during the winters), I had the service centre replace the sensors for me.
My S6's battery temperature never exceeds 40°c, while the CPU occasionally reaches 70°c, at that point, my S6 would perform an automatic soft reboot. But that's it though.
Click to expand...
Click to collapse
The temeryture is so high that I do not even need to measure it by app. The device burning my hand (literally) is enough indicator for me.

Yanush7 said:
The temeryture is so high that I do not even need to measure it by app. The device burning my hand (literally) is enough indicator for me.
Click to expand...
Click to collapse
Have it checked out at the service centre.

Solved
I had to allow it to turn off and let it cool down. left it 4 hours, turned it back on, (in all honesty, trying to replicate the problem for RMA) and all fine, over heating message disappeared and no problems since really weird.
anyway thanks for all the help guys
Cheers

See attached image, that's normal on my S6 and my ex-S6 Edge.
Sent from my Samsung Galaxy S6 using XDA Labs

DaryllSwer said:
See attached image, that's normal on my S6 and my ex-S6 Edge.
Sent from my Samsung Galaxy S6 using XDA Labs
Click to expand...
Click to collapse
I think better app for cpu temp is CPUZ. It gives you more info.
Right now I'm on custom rom (superman rom) and with custom superkernel 1.4 and it seems like the phone overheats less - but I do not really know what are the good standard Temps for processor in basic use.

Yanush7 said:
I think better app for cpu temp is CPUZ. It gives you more info.
Right now I'm on custom rom (superman rom) and with custom superkernel 1.4 and it seems like the phone overheats less - but I do not really know what are the good standard Temps for processor in basic use.
Click to expand...
Click to collapse
How do you know your phone 'overheats'? Does it show any message on the screen saying it is or does it self reboots? If it doesn't, it's not 'overheating', basic logic.
My S6 has 'overheated' only twice, it self rebooted.
Sent from my Samsung Galaxy S6 using XDA Labs

Phone Wake after screen replacement.

I replaced my screen and am now having problems waking the phone. It doesn't respond when i short press the power button, but i know that the button functions as it reboots when i long press it.
It does wake when i plug in or remove the power cable, and everything else seems to be working perfectly.
I tried changing the settings to wake on volume up, or double tap, etc, but those dont seem to work. Perhaps they are not compatible with my kernel.
Does anyone have a suggestion for fixing this issue, or know of a suitable ROM which will allow wake on volume up, double tap, etc.
Currently I have:
CyanogenMod 13.1-20161007-TS-libra
Kernel
3.10.96-perf-g0338dd3
It's probably time to update anyway, i haven't done so since CyanogenMod disappeared.
Cheers for any advice.

Additional Info: In TWRP Recovery, the power button does wake the screen perfectly. So it seems like a software issue, but that is bizarre as i haven't made any changes to ROM or settings in six months. It would make more sense to be a hardware issue, seeing as i just had the phone all pulled apart.
Any idea how a hardware problem could make the power button work in recovery but not in android?

Maybe you should clean install the rom.
Trimis de pe al meu Mi-4c folosind Tapatalk

I had exactly the same problem. In my case, the wrong readings from the proximity sensor caused by the screen protectors. After removing the protection and sticking so that it does not cover the sensor, the symptoms have subsided. The problem (probably) is not occurring when using the screen security glass.
Sent from my Mi 4c using XDA Labs

Jaqbherc said:
I had exactly the same problem. In my case, the wrong readings from the proximity sensor caused by the screen protectors. After removing the protection and sticking so that it does not cover the sensor, the symptoms have subsided. The problem (probably) is not occurring when using the screen security glass.s
Click to expand...
Click to collapse
Thanks, that is interesting.
I have resolved this problem.
I tried to format all data using twrp recovery, and then restarted, planning on making clean install.
However the phone reinstalled cyanogenmod on restarting. (Still not sure how this happened, but if let it go so i could see what happened.
Now my phone is working perfectly, although still with older ROM, which i would like to upgrade sometime. I'm a bit lazy with this to be honest. I've got other projects, and the phone is working great.

App that can auto change brightness px5?

So, ive got a px5 with malaysk marshmallow rom.
The problem ive got is that no matter what app or permissions i give the apps (lux, car launcher AG, and so on) cant adjust the brightness. They can only change it in "mask" mode, that fakes the brightness change.
Is there any app or module that can really change it? I would like to have full brightness during day and lowest during night.
Skickat från min MI 5 via Tapatalk

WarSpaz said:
So, ive got a px5 with malaysk marshmallow rom.
The problem ive got is that no matter what app or permissions i give the apps (lux, car launcher AG, and so on) cant adjust the brightness. They can only change it in "mask" mode, that fakes the brightness change.
Is there any app or module that can really change it? I would like to have full brightness during day and lowest during night.
Skickat från min MI 5 via Tapatalk
Click to expand...
Click to collapse
Don't you have connected the illumination wire of the headunit?
By this wire...the unit can dim brightness when car lights on.
Enviado desde mi SM-G950F mediante Tapatalk

ikerg said:
Don't you have connected the illumination wire of the headunit?
By this wire...the unit can dim brightness when car lights on.
Enviado desde mi SM-G950F mediante Tapatalk
Click to expand...
Click to collapse
I dont really know as the harness came all setup for my model specific head unit. But i dont want i to dim when lights are on, since in Sweden we must have lights on at all times by law. I just want it on full brightness during day and on lowest during night. Car launcher AG got this function, and it works on my phone, but not on my hu. Only mask mode works, but that is no good.
Skickat från min MI 5 via Tapatalk