dead/stuck pixel ?! - Galaxy Tab 7.7 Q&A, Help & Troubleshooting

Hello dear Xda members
I have a galaxy tab 7.7, i got it from a friend (too expensive from Samsung) so I run the dead pixel test (basic colors) and I see a strange dead/stuck/lazy pixel !
after reading a lot about dead pixels on galaxy S/2/3 forums, mine is a special case. The screen is perfect all the time, the wallpaper is nicely displayed, but when I run the screen test, and when I use a blue background, I have a black dot in the top left of the screen, well I told myself that the pixel is dead, no big deal for the price i paid (still the best gadget i owned) but when switching to black background, the same dead pixel turns blue !!! (this is annoying when watching movies with dark background or totally black wallpaper) still, I can't notice the dead pixel in daylight, the only way to see it is in complete dark room.
well, I don't know much about Amoleds since this is my first one, but I don't understand why this pixel don't display the color when the system call for it (black dot on blue), and it turns ON when it should be OFF (blue dot on black)?!
any thought about this problem ??? is it repairable since i don't have any warranty ?

I had the same issue with my sgs2, samsung replaced the screen under warranty. I am sorry I don't have any useful information for you I know you don't have warranty
Sent from my GT-P6800 using XDA Premium HD app

thanks mate for your feedback, in this case my problem is not repairable without a new screen replacement
anyway am using it without problems, and the pixel isn't that remarquable.
best regards
Sifou
Galaxy Tab 7.7

Have you tried any Google Play apps?
May or may not help, worth a go though

yes sir, i did nothing changed! maybe the problems that Google play apps can cure are different from mine.
best regards
Sifou
Galaxy Tab 7.7

I tried those apps too, they can't antagonise the pixel as its not a traditional lcd panel, nor will massaging it.
Sent from my GT-P6800 using XDA Premium HD app

Thread moved to Q & A section, post in the relevant section next time.

Related

Screen burn in issue? Anyone?

Hi, I am planning of getting one of this beast. After reading on the internet about possible amoled screen burn in after using it. Could somebody share his/her experience regarding this? Is burn in screen real problem or small problem with this device? Thanks.
Sent from my GT-P7300 using xda premium
Never heard of screen burn in issues with amoled screens. I've had the original Galaxy S for over two years and have had no issues.
Sent from my GT-P6800 using xda app-developers app
I have very, very faint screen burn in at the bottom of my 7.7 where the status bar is. Can only really notice if I'm looking for it on a white screen, but more obvious on a red screen. I believe the only reason it happened is because I took it out in the sun with me one day and put brightness up to 100% for like 90 min while browsing/reading because before that my screen was flawless. I'd say if you can keep it at low brightness you should be fine. If you're rooted I'd get a hide bar app. In contrary to all this though, my Note II has no burn in whatsoever and I leave that thing on auto brightness.
songmeesay said:
I have very, very faint screen burn in at the bottom of my 7.7 where the status bar is. Can only really notice if I'm looking for it on a white screen, but more obvious on a red screen. I believe the only reason it happened is because I took it out in the sun with me one day and put brightness up to 100% for like 90 min while browsing/reading because before that my screen was flawless. I'd say if you can keep it at low brightness you should be fine. If you're rooted I'd get a hide bar app. In contrary to all this though, my Note II has no burn in whatsoever and I leave that thing on auto brightness.
Click to expand...
Click to collapse
Thanks for the heads up man!
My Tab is an ex demo unit and had some massive image burn in due to it being left on while on display with the screen overlay still on the unit, so i had the big O and the smaller icons burnt into the screen, i only really noticed them when viewing solid lighter back grounds, and as i have used the tablet more for the purpose it was meant to be used for rather than sitting looking pretty on display the image burn has all but disappeared, can only really pick up traces of the burn if a really look hard enough
Here is link for tab 7.7 screen issues.
http://forum.xda-developers.com/showthread.php?t=1463622
It has been already discussed before, and my question is has Samsung fixed the issue yet? Most of them say is a manufacture defect. Or maybe it just Amoled technology at infancy.
Sent from my GT-P7300 using xda premium

[FIX] fix the yellowish screen tint (from one x+ xda forum)

I found this one one x+ general forum. Credits to roobeyn.
"Warning!!! As someone commented he was totally unaware of this problem until he used this fix and it destroyed his experience with his phone
[REQ]Any developer that could help me with something? I want to make this app matching system UI with ready filters and put it in Setting so that it will look integrated like the galaxy screen settings, that would help ppl think the screenproblem is just a soft problem and doesn't depend on hardware. Please be kind and PM me
As many have noticed, and even made some ppl crazy is the yellow tint on our screen(HTC One X, Xperia Ion, S etc).
Searching for screen filtering at play store made my day!
Then i found this app: LINK https://play.google.com/store/apps/...e=search_result&rdid=com.netmanslab.sa&rdot=1
I installed it and then made a filter with:
Red 0
Green 0
Blue 8
Brightness: 100%
Contrast: -0
That made me feel like replacing the whole screen!
Second thing you should do is:
Press the MENU-button and go in to Options
Autorun [YES]
Hide status bar icon [YES]
Enjoy your screen!"
Works perfectly! Thanks again to roobeyn
Wow!
People are often choosing blue screen as being more white than real white color is. Please read why choosing white other then 6500k is making your eye not seeing many colours.
http://www.keohi.com/keohihdtv/learnabout/definitions/why6500k.html
Screen in one s is really very good calibrated as in every HTC phone past HTC Desire with amoled (which was first HTC calibrated screen with ota update and that update made reddish screen looks better).
Of course as every amoled it is very oversaturated, but it looks good on phone screen.
Anyway your advise for people which likes blue screen: adding blue to everything makes black not true black. This is looking bad, kills amoled contrast when normally black pixel are totally blank (because they are not lighting) and in that way will shorten battery life as normally on amoled black parts of the screen are not using any power.
sent from my OneS
Thanks for sharing the app. I don't use the color settings, I love the screen as it is, but the lower than usual brightness helps me at night..
Sent from my HTC One S using Tapatalk 2
What yellow tint, using that filter your screen is "colder", and like every filter you loose processing power and some colour. You are free to use it, but when you bought the phone, you checked the screen... Right?
Thanks for sharing I didn't notice the tint till I got the nexus 7, the one s screen is yellow compared to it, that edit with your settings fixed that, thanks.
Sent from my HTC One S using xda premium
No problem. glad to help.
Sent from my HTC One S using xda app-developers app
One s screen is yellow wish. Its because of the amoled screen we have
Sent from my HTC One S using xda app-developers app
Never minded of the yellowish screen but i've tried tour app band the screen looks better white now is a real white
phoenixita said:
Never minded of the yellowish screen but i've tried tour app band the screen looks better white now is a real white
Click to expand...
Click to collapse
But all of the other colors are blue..
Sent from my HTC One S using Tapatalk 2

Smearing issue "fixed" in MF8 - The truth behind it

So, we all knew that the smearing issue happening in our phones happened generally around images/text on a black background.
Many of us thought this could be a software issue but in reality this is an hardware limitation (I know many users already know this but there are some still hoping for it to be a software issue).
I had a lot of issues with the first S4 I bought. Most of the issues were around the back light bleed on the bottom and screen color uniformity. After 3 months battling with Samsung with no end in sight, I bought a new one, this time I choose the white one.
The new one has nice whites and the screen uniformity is close to perfect (or at least it seems so, so far). After checking the screen for some hours, I decided the phone was good to be used and started by updating the firmware to the latest available to me (MF8). After this I went to the settings menu to setup some options and I was amazed to see the smearing was almost gone. I never believed it to be a software issue so I was very surprised by this.
However, my surprise ended very quickly when I check the screen on a dark environment. Samsung did not fix the smearing (as it is a hardware limitation and not software like I always thought) they just changed the background of the settings menu from pure black to a very very dark gray.
This can be confirmed if you go to the settings menu and check the background. Then while in the settings menu, drop down the notification back. The notification bar is pure black, while the setting background isn't. Check this on a room without any lights and it will be very easy to detect.
The whole point of this thread is to inform other people from XDA that Samsung just used a workaround (like everything done by Samsung) to "fix" this issue. There is no way to fix this, this is a refresh rate limitation of the screen. If you want the smearing to be gone you cannot have pure blacks.
Nandui said:
So, we all knew that the smearing issue happening in our phones happened generally around images/text on a black background.
Many of us thought this could be a software issue but in reality this is an hardware limitation (I know many users already know this but there are some still hoping for it to be a software issue).
I had a lot of issues with the first S4 I bought. Most of the issues were around the back light bleed on the bottom and screen color uniformity. After 3 months battling with Samsung with no end in sight, I bought a new one, this time I choose the white one.
The new one has nice whites and the screen uniformity is close to perfect (or at least it seems so, so far). After checking the screen for some hours, I decided the phone was good to be used and started by updating the firmware to the latest available to me (MF8). After this I went to the settings menu to setup some options and I was amazed to see the smearing was almost gone. I never believed it to be a software issue so I was very surprised by this.
However, my surprise ended very quickly when I check the screen on a dark environment. Samsung did not fix the smearing (as it is a hardware limitation and not software like I always thought) they just changed the background of the settings menu from pure black to a very very dark gray.
This can be confirmed if you go to the settings menu and check the background. Then while in the settings menu, drop down the notification back. The notification bar is pure black, while the setting background isn't. Check this on a room without any lights and it will be very easy to detect.
The whole point of this thread is to inform other people from XDA that Samsung just used a workaround (like everything done by Samsung) to "fix" this issue. There is no way to fix this, this is a refresh rate limitation of the screen. If you want the smearing to be gone you cannot have pure blacks.
Click to expand...
Click to collapse
Some people really make me :crying:
MichelN said:
Some people really make me :crying:
Click to expand...
Click to collapse
Care to elaborate on your comment?
i never had any smearing on my s4 so maybe is not a universal issue
Sent from my GT-I9500 using Tapatalk 4
It's not fixed and will never be fixed.
Maybe except some dirty trick such as replacing pure black with dark grey at kernel level etc.
I've lost hope.
Sent from my GT-I9505G using xda premium
changing the background color from black to dark grey wont do anything samsung....
i wish there was a real fix but sadly i dont think there will be because of the way this new amoled works
It's the technology, it's the amoled, it's all about the inertia. Sell your phone If u can't stand it. It can't be fixed. Period. Deal with it or get different phone.
Wysyłane z mojego GT-I9505 za pomocą Tapatalk 2
Am I the only one who NEVER HAD ANY PROBLEM with my S4?
My s4 works perfectly. So keep me out of your bubble of mishaps.
Sent from my GT-I9500 using xda app-developers app
Smearing? Never experienced that in my i9500. Is it a myth?
Sent from my Galaxy S4 using XDA app
Some people seem that they don't care enough to even notice that the smearing even exists ...
Also in settings it was a bit annoying but i prefer to have pure black if that's the only disadvantage because i don't think it will proc in anything else other than scrolling because it won't need faster refresh rate ...
I'm not an expert in any form on this kind of things but when i upgraded my phone and saw no smearing in the settings i was first surprised but since i ve read that this is a hardware issue and i double checked it to notice that is a placebo ... but since my phone works as it should and doesn't annoying me with the things i want it to do i don't care that is that this "fix" it's just a cover to the problem and not an actual solution
joyo22 said:
Smearing? Never experienced that in my i9500. Is it a myth?
Sent from my Galaxy S4 using XDA app
Click to expand...
Click to collapse
Your phone has smearing as well. They all do. Not seeing it yourself doesn't make it a myth
wanna see smearing? get some white yellow blue or something like that walpapper (stock blue is perfect), install MX Player from Market.
Get to menu, scroll to the page when the icon of MX Player is, now quickly swipe from right to left, you'll see that black part of icon is extending for maybe 0,1 sec...
That's the smearing, but many of users are pissed with this minor thing, which I can barely see.
drakexpl said:
It's the technology, it's the amoled, it's all about the inertia. Sell your phone If u can't stand it. It can't be fixed. Period. Deal with it or get different phone.
Wysyłane z mojego GT-I9505 za pomocą Tapatalk 2
Click to expand...
Click to collapse
So you knew that there will be smearing issue before you bought S4???
And also quite surprised so many people haven't able to observe this issue in their phones.
Yes, I knew that, It's still so tiny tiny issue comparing to those on HTC ONE or Xperia Z (I had Z and One before S4).
Everybody should just download screen adjuster and up the contrast to 13 or 15
That way it will still be very very dark gray looking black with almost non existent smearing. Problem (kinda) solved!
THANKS
soulzero said:
Everybody should just download screen adjuster and up the contrast to 13 or 15
That way it will still be very very dark gray looking black with almost non existent smearing. Problem (kinda) solved!
Click to expand...
Click to collapse
THANKS MATE! This solved it all! I couldn't stand that problem, to the level I couldn't use ANY black background, thanks, thanks, thanks.
Andresgomezsar said:
THANKS MATE! This solved it all! I couldn't stand that problem, to the level I couldn't use ANY black background, thanks, thanks, thanks.
Click to expand...
Click to collapse
Why didn't my GT-I9300 S3 had this?
Why didn't my GT-N7100 Note 2 had this?
Why does my GT-I9505 S4 have this?
It makes me wonder.... do the Note 3 have it as well?
born4trance said:
Why didn't my GT-I9300 S3 had this?
Why didn't my GT-N7100 Note 2 had this?
Why does my GT-I9505 S4 have this?
It makes me wonder.... do the Note 3 have it as well?
Click to expand...
Click to collapse
Because they didnt turn off black pixels completely until S4. Note3 should be same as S4
Sent from my GT-I9500
dragon135 said:
Because they didnt turn off black pixels completely until S4. Note3 should be same as S4
Sent from my GT-I9500
Click to expand...
Click to collapse
Noticed ... http://forum.xda-developers.com/showpost.php?p=46123130&postcount=21

Screen Burn-in

Anyone else notice what seems like to be a screen burn in on their Galaxy S6 (non-edge). I was outside today in direct sunlight for the first time and I pulled up google chrome (white background) and I noticed dark gray lines as depicted by the red lines in the pictures. Just curious if anyone else has this?
http://forum.xda-developers.com/galaxy-s6/help/phone-please-try-thispossible-screen-t3072949
I have found exactly the same issue on mine. But it's only noticeable in direct sunlight it seems. At present it isn't a deal breaker for me but it's certainly a bit odd. Surely it's a little early for screen burn in?
BlameUREdiction said:
I have found exactly the same issue on mine. But it's only noticeable in direct sunlight it seems. At present it isn't a deal breaker for me but it's certainly a bit odd. Surely it's a little early for screen burn in?
Click to expand...
Click to collapse
it's not burn-in, it's seeing through the screen to the assembly
Same here, Vodafone spain. Galaxy s6 black
ingenious247 said:
it's not burn-in, it's seeing through the screen to the assembly
Click to expand...
Click to collapse
+1.
It's not screen burn in. It's the metal chassis behind the screen which you are seeing., which is only visible in direct sunlight.
Ok but is that normal?I have the same issue and at the store i notice the same issue on one new-out of the box device.Should we replace our device or this is normal?
I started a thread to this issue yesterday. Because I didnt saw this one.
Just replaced my phone because some issues with the display, flash led and this problem.
Think my replacement will have it, too.
For now I cannot anwer me the question if it is suitable to accept this for a phone in this price segment. The summer is coming and the issue will be there on a lot of days.
PerryRhodan said:
I started a thread to this issue yesterday. Because I didnt saw this one.
Just replaced my phone because some issues with the display, flash led and this problem.
Think my replacement will have it, too.
For now I cannot anwer me the question if it is suitable to accept this for a phone in this price segment. The summer is coming and the issue will be there on a lot of days.
Click to expand...
Click to collapse
I think i will not settle for a phone at this price range and this stupid issue and i think that nobody should. I will just pick up Note 4 with Exynos if this issue is not resolved with the 3rd s6 device.
Me too.
On a teardown from ifixit you can exactly see the unit that creates these frame.
Thank you very much! I also experienced this on my Galaxy s6. I ordered a replacement and also noticed it.
Just to let you now guys.I tested 4 new s6 devices and all of them had this issue!!!This is a big thing and nobody is making the real fuzz abou it.So i picked up Note 4 with Exynos.Do not buy s6, wait for month of two just so they can resolve this.
I think it is a design problem and there will be no fix for it.
If that is the case, then ppl should make a big deal about it.I don not have this phone anymore but I would like to help if this issue continues.I will contact samsung via facebook and see what we can do.
I got my replacement yesterday and yes, the problem still exists. The phone is from Vietnam, 04/15/15.
The story goes on. After Amazon Germany stopped selling the black 64 GB edition I replaced my one against the white 64 GB. This one shows the frame on any background. Not only white. Only on very dark ones there is no see.
And I can see it under normal light conditions. Not only sunlight.
A very very very bad Display.
Why is it just this quiet about the issue? It's not less ugly like the flash LED or the wiggling home button issue.
My S6 (Germany; Mediamarkt) doesn't seem to have a a burn-in.
http://www.directupload.net/file/d/3982/wj6uc78e_jpg.htm
Try this in direct sunlight please with max brightness.
It is not a real burn in. It is a frame of a used component that Lays direct under the display.
Real screen burnin
We were at the Verizon store today and noticed that all the Edge phones had real screen burn in. One had the Verizon logo burnt into the screen that you could see clearly from within any app with a white background. We used chrome and a normal web page to show the employees of the store. The galaxy s6 egde had some sort of Verizon demo bar burnt into it. It seems to be a problem with the screens. I googled for it and found this thread. I am surprised this hasn't become a serious problem for Samsung yet.
xeni said:
Anyone else notice what seems like to be a screen burn in on their Galaxy S6 (non-edge). I was outside today in direct sunlight for the first time and I pulled up google chrome (white background) and I noticed dark gray lines as depicted by the red lines in the pictures. Just curious if anyone else has this?
Click to expand...
Click to collapse
Had a very bad screen burn in my S5 - i could actually see the title of the email app i have to use for work on a white screen without sunlight (title of the app is ALWAYS at the top when working in the app). Now had the S6 since it has been out and starting to see the same issue. Spoke with Samsung about this and they stated that the S4, S5, S6 and all Note devices are capable of getting screen burns with High Contrast imaging or lines. They said they could replace my screen but i would be without a device for nearly a month, and the carrier will not complete a warranty because the device still functions perfectly.
THANKS SAMSUNG!

Grey lines on display

Noticing a kind of very lite shade of greys in white screens irrespective of the brightness. No problem with any other colors. Can’t capture it in a snap. So tried my best to represent it in the image(attached). You can download the image and zoom-in and shake the image in the marked area to clearly see what I’m talking about. Anybody else having this issue? Is it huge issue as I will be working with photographs in the phone?
Just bought the device yesterday. Would be nice if someone can tell me how to convey this to the retailer without making him think that I’m crazy for a replacement. :laugh:
Unlocked model S7(flat)
I have found that all modern high density AMOLED screens have this to some extent. I bought 7 Galaxy S6s and none were perfect, with some better than others. 99% of people won't notice it. And even if you're someone who can notice it, sometimes it takes a couple weeks of owning the phone before you see it, and then once you see it, it's hard to unsee it. It's especially noticeable if you're scrolling and move your eyes up and down the screen with the content as it moves.
gtg465x said:
I have found that all modern high density AMOLED screens have this to some extent. I bought 7 Galaxy S6s and none were perfect, with some better than others. 99% of people won't notice it. And even if you're someone who can notice it, sometimes it takes a couple weeks of owning the phone before you see it, and then once you see it, it's hard to unsee it. It's especially noticeable if you're scrolling and move your eyes up and down the screen with the content as it moves.
Click to expand...
Click to collapse
I saw it in the first day itself. Expected value for the price paid is not delivered means. It's cheating
Its very common on AMOLED devices unfortunately and my guess is that the vast majority of users cannot see it so lower # of units returned to samsung and they probably will blame it on QA. If a lot of consumers would start to notice it and demand for close to perfect panels then samsung will probably up their AMOLED game.
we bought 3 sgs7 phones all of them have this issue...how can such a company like Samsung do this ...like i cant see that LOL my vission on close distances is verry verry good so thats whay i saw those gray lines in a minute after buying one.i went to see my brothers gs7 after that and of course his one was the same and then after one week my father bought one white version so i thought that the 3rd one has to be a good one but NOPE it was the same story again...im very pissed so i will go to Samsung and tell them about it and will see what will they say...just to let u know guys i had similar problem on xperia z5 but instead of grey lines i had white ones and also some white spots and i send it to waranty and told them about the display issue and they have replaced the screen and now its perfect...so im goin to do that on Samsung aswell. good luck ppl
just to let u know guys i went Samsung and they replaced the screen but those gray lines are visible again so they sad that they cannot fix it and change screen everytime.... it looks like that alot of led panels are baddly constructed in the factory so i decided to return the phone.
I am on my 3rd galaxy S7. The 1st had the SD card connecting and disconnecting. The 2nd one the USB port would no longer transfer data(learned because VR stopped working) I am worried about the build quality of this phone....
Sent from my SM-G930T using XDA-Developers mobile app
JovHok said:
Noticing a kind of very lite shade of greys in white screens irrespective of the brightness. No problem with any other colors. Can’t capture it in a snap. So tried my best to represent it in the image(attached). You can download the image and zoom-in and shake the image in the marked area to clearly see what I’m talking about. Anybody else having this issue? Is it huge issue as I will be working with photographs in the phone?
Just bought the device yesterday. Would be nice if someone can tell me how to convey this to the retailer without making him think that I’m crazy for a replacement. [emoji23]
Unlocked model S7(flat)
Click to expand...
Click to collapse
I have exactly this same issue and it's driving me nuts! I cannot return my phone now, but it's very noticeable for me those grey lines when some other people I tried to show it couldn't see it...I hate AMOLED displays, I have never had a phone with an AMOLED display which was perfect, all of them always had some issue at some point. From Motorola, other Samsung, Huawei, all of them had some sort of issue with the display.[emoji35]
Enviado desde mi SM-G930F mediante Tapatalk
Replaced once, too. Mine was not a perfect line, like gray dust splattered along a line. Especially visible with grayish flat images, there were clear fluctuations on shade of "gray". Second device is almost perfect. If you look with magnifying glass , there were some pinkish littttle dusty dots on white, but it is really hard to see with naked eye. So happy with second now.
This issue is present because AMOLED screens don't use backlight. Every pixel is emitting light, and my guess is that they aren't distributing the same amount of brightness on every area of the screen.
It's noticable, but as some said to a very small amount of people, and it isn't that much of an issue if u ask me. Bigger issue is that amoled screens burn in over time. I could see my keyboard on white background on my S5 after a year and a half of use. Thank god that s7 has themes so I can change keyboard layouts.
Everything comes with a price... LCD's have their flaws, and so do AMOLED's.
Good news, its just a software bug on Android M, just reflash it to Android N and it will be fixed.
bitterano said:
Good news, its just a software bug on Android M, just reflash it to Android N and it will be fixed.
Click to expand...
Click to collapse
Not here, I'm running the latest beta on my s7 and the grey lines are still there, it's a problem with the display itself.
Enviado desde mi SM-G930F mediante Tapatalk
Found a perfect solution
Found a complete solution here.
Works like a charm.
techgadgyblog.wordpress.com
My experience.
Hi all,
I have an unlocked, rooted, Nougat ROM S7 Edge and I have been experiencing the same issue for 3 months.
The only way for me to fixed it is to flash Superman ROM, then the lines disappear. Any other ROM (Elyos, S8 ports, ...): I have the grey lines. A kernel issue?
Cheers.
P.S.: Flicker free kernel used to work with Superman ROM but if I flash it after any other ROM, my phone gets stuck in boot.

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