Hello all,
Something strange suddenly happened to my tmobile s7 edge, all of a sudden whenever I dim the brightness on the phone the screen goes crazy with flickers and greens. I need to set the brightness to the highest setting so the flicker can go away I was wondering if anyone else has had this issue and if they found a fix that doesn't involve having to change the screen, I live outside the US and I bought the phone on EBAY so any chance of getting it replaced is not an option.
P.S I've never dropped my phone ((
That's a software issue, nothing is wrong with your phone. I had that on my S5 from Lollipop to Marshmallow. Hopefully somebody could give you a more in depth answer.
Sent from my SM-G935FD using Tapatalk
Its not a software issue it sounds like a hardware issue and some customers reported this problem on a german portal. They got a replacement of the display/board.
I had the same problem here: http://forum.xda-developers.com/showthread.php?t=3359221
Its a hardware issue. You need to ask your Ebay seller to replace it if they have such guarantee.
Related
hey guys
for a long time i am having this issue with my screen.
it flickers sometimes, no pattern of times. but it does flickers almost all the time when i put it on automatic backlight, or if i set the brightness to lowest level, or 1-2 level more than lowest.
at first i thought the battery may be going bad, because i did have battery issues. but now that i have bought a new battery, it still happens.
i read that it might occur because of the s-view covers. but i have s-view covers for almost a year, and it only happens for about 3-4 months.
though i did buy a new s-view cover on august. could this be related? i think i did have flickering problems even earlier than august.
either way, i had removed the s-view cover from my phone, it does seem to flicker less. and weird thing, sometimes it just enters the s-view mode where all screen goes black except the window part... maybe the phone misses the cover
any way. what could be the problem? how can i solve it? maybe i should format the phone and install another rom? i have the latest Omega rom version right now.
thanks everybody.
anybody help?
no one?
I think I've found the best solution out there for most annoying screen flickering issues... Done a substential amount of digging and finally discovered the app "Twillight" works like a charm by enabling backlight control...Just try it out with similar issues and post your review and thank me...Cheers...
In my A3, the screen flickers when the brightness is low. It goes away if I increase brightness. Didn't drop or do anything to phone.
Exact same problem here. I came across this post when I did a Google search to see if anyone else had the problem and it seems to be an issue that effects numerous Samsung phones, not just the A3. It also seems to be a software issue rather than an actual problem with the screen. I haven't tried this myself yet but I read that if you lower the brightness as low as you can before the screen flicker starts and then download the app screen filter and turn down the brightness further using screen filter rather than the built in control you don't get the flickering which would definitely suggest a software issue rather than hardware, particularly with multiple different Samsung models being effected. It's only really an issue for me when I get to below 5% battery and the screen automatically dims otherwise I never see it happening, it was only after reading your post that I even found I could cause it to happen by lowering the brightness. If you're someone who likes to use the very low brightness then maybe the screen filter thing would be a good workaround for you until the software issue is fixed by samsung, if they ever give us Marshmallow.
My lower half of my Samsung Galaxy A3 flickers on a low light. I read that you have to shut the phone down, take the battery out and leave it awhile before putting the battery in and starting the phone again . However, battery doesn't come out of the phone and my screen doesn't flicker on full brightness either.
Its not solved that way. I took it to Samsung and they replaced the screen now everything it good
Go to developer settings and turn on " Disable hardware overlays" . This will force GPU for screen composting.
This is a common Samsung problem, not just A3. Hardware problem. My phone is knoxed so I'm not sure I'm gonna bother contacting my operator.
Knox isn't a problem. i was rooted and had custom recovery installed yet service centre replaced the display.
As mentioned by OP, the issue is caused by a layer of the AMOLED is bent (due to pressure while in pocket or other reasons).
That is the thinnest and most bendable part of an AMOLED screen.
Only fix is replacing the screen.
Source : A Samsung Employee at the service center when my sister's J7 had this issue and we sent it there.
It's not working .... :/abhijith.prakash
Hi. I just wanna share it. I found in this (xda comment post by some one I forget him for awhile looking for him to say thanks very much) fix for my s5 g900f with latest modem and bootloader. I use RR 7.1.2 rom.
The app is "active screen filter". That save my life.
Hello,
So my S7 edge got a replacement display due to being broken like 2 months ago. Today purple smudges started to appear, when I used the device for quite some time heavily and it got quite hot. They disappear when I change display mode or when brightness changes. But sometimes reappear. Is this a defective Display, should I get it replaced via warranty again?
Mine does the same thing, but it has never been repaired or suffered any kind of serious damage. It's not that annoying either.
Could it be some kind of factory defect?
When googling I found it clearly is a hardware display fault. As I had my display swapped by a third party mobile repair shop, they would be the ones to make accountable.
It only occurs at certain brightness settings, and not in all apps/states of display - mostly in those which are really bright like chrome browser without tab open, or dict.cc dictionary app.
I'll keep an eye on the issue and just demand warranty, as this display isn't even 2 months old now. They give 6 months of warranty on exchanged parts. So if it does not go away, I'll just get it replaced again.
It just occured today out of the blue, after flashing custom rom / flashing some stuff and constantly playing on the phone, and it became a bit hot.
It occurred exactly the same to me, after flashing a custom Rom. Now I can't remember which one, but it changed the screen's aspect ratio to simulate the S8's.
After that I flashed stock and the problem kept happening
But I don't think this can be caused by a custom rom... it's a hardware fault.
I hope so because I really wanna install a custom rom ;(
Google the issue - it happened a lot apparently and there is literally no connection to custom Roms - it's a defective Display. I did not have the issue anymore BTW.
I have to get back at this again. I recognized that I can Only see these smudges under certain conditions. I can not see them when I am inside. Only outside, and Only from specific angles - also dependant on screen brightness. When I cover the screen with my hand they disappear.
At first I thought it could also be some fault with the transparent protection skin I also applied one day before first noticing this purple screen problems. But the thing is - they move when scrolling, Only in a small portion of the screen but they go up and down.
The fact I can Only see them in daylight makes me wonder if it's got anything to do with the surrounding brightness sensor that does the automatic brightness and display mode for you.
I find it very strange that I can not provoke the issue indoors, also not if I set up brightness to max.
Hi people,
Im sure most are aware of the flicker in j7 2015 model. I have both j7 2015 and j7 2016.
It was last year when j7 2015 got marshmallow update. Within few hours, the backlit went crazy. It was impossible to dim the screen without seeing all disco pink lines.
There were claims that it was fixed but i still have this issue. Samsung service centre said no display available and warranty period got over this way.
Now just a few minutes earlier, i faced the same isssue in my j7 2016 model. The screen became dim all of a sudden. On closer inspection i found every alternate pixel line was missing vertically. It tried to turn off and on the screen a few times. Then the issue became severe and i was seeing all pink screen. I could barely see the text on the screen.
I had ampere installed and saw that the phone was using over 970 ma of current. So i switched it off and tried after 5 minutes and nothing changed. Twrp, offline charging and holding power button with battery out didnt work either.
I kept on increasing and decreasing the brightness to max and min. Some times the flicker stopped briefly and i could see perfectly. After about 30 minutes of struggling the screen became normal automatically.
I started typing this story when the screen got back normal and it hasn't done wierd flicker till now.
If you face any issue like this, please share over here.
Im also sharing this with samsung so they may or may not try to investigate. They are leading manufacturer of oled display and although the display is fine, im sure their driver circuit have some flaw.
Screenshots , the white one is for low brightness. It goes reddish when brightness is high
I managed to fix the screen by replacing the capacitor array used in the screen.
I did some research and found the 20khz PWM singal used for the screen was out of sync. There is a clock pulse that is controlled by small capacitors to keep it a square wave instead of sinusoidal.
Wont talk more about what and how that works, its there on the internet, just google pwm brightness control circuit.
The capacitor used are either cheap or not within specification or maybe even completely of wrong values.
PS. I know how to handle hardware and soldering, make sure you know what you are against.
Before and after screens. Although i got some scratches on the touch panel, i saved a few bucks in my wallet
Used root dim tool along with team viewer to handle this.
Since i dont have a technical specification for this circuit, ill be doing some more research to fix it properly.
Wow!!!
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dodo2244 said:
Wow!!!
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I need some help with this. I need a broken lcd from j7 2016 model to grab the capacitors. If anyone could help me, that would be great
I recently replaced the screen on my K20 Pro and I noticed that there are a few malfunctions. Screen brightness suddenly goes max for a few seconds when using opening the phone from lock screen and usually when using fingerprint to unlock (I have my Auto-Brightness set to off). Ghost touches when tapping but none when swiping. I was wondering if this is a common malfunction after replacing the screen (calibration or something) or did the installation of the screen went wrong or is it because the LCD used to replace the original one was defective. Thanks for the insights.
i just replaced my screen four days ago and so far i got no problems of some sort..
so, i think it's probably the installation or the unit's fault. idk tho
I'm just annoyed by the sudden screen brightness max. To be honest I think the ghost touch thing is because of a defect LCD, but I think the brightness problem is from the system. It's like the phone does not recognize or remember the previously set brightness. I hope there's a solution for this. Do factory resetting the phone solve any brightness problems?
hello! did you managed to solve this problem? I have the same problem
if you removed foil and it still touch in random parts of screen,. then send it back. i had the same symptoms with a few screens that I repaired. just Chinese quality
yaro666 said:
if you removed foil and it still touch in random parts of screen,. then send it back. i had the same symptoms with a few screens that I repaired. just Chinese quality
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i did the replacement with not 100% compatible display...because it was way cheaper than the display I needed...(from an oppo phone) i know it sounds weird but the display was 200 dollars( the 100% compatible from oppo) and i payed like 70 for this display that flickers the bringtness..but they told me a factory reset can solve it?
what do you think?
try, but I doubt it. looks like fauly/not compatible to me.
try flashing latest miui to make sure you did everything to get it to work, if that doesn't make it better just don't waste your time. if you have more technical data on both anoled and lcd with connections described (every pin) then you could make research a d bypass if needed. otherwise send it back
vincedrian said:
I recently replaced the screen on my K20 Pro and I noticed that there are a few malfunctions. Screen brightness suddenly goes max for a few seconds when using opening the phone from lock screen and usually when using fingerprint to unlock (I have my Auto-Brightness set to off). Ghost touches when tapping but none when swiping. I was wondering if this is a common malfunction after replacing the screen (calibration or something) or did the installation of the screen went wrong or is it because the LCD used to replace the original one was defective. Thanks for the insights.
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managed to solve? I have the same problem, besides sometimes the screen seems to lose sensitivity, I saw in some groups people recommend buying parts from the dragon-tt store....I'm thinking of taking a chance....