Develop Bugs

Two Defective Screens in a row. And I bet you have the same issue.

I'm calling all the GN owners to check your screen to see if you could duplicate the same issue I have on my TWO GNs.
Step:
1. Manually set your screen brightness to lowest brightness.
2. Go to a complete dark environment like in your closet or test this at night with all the ambient lights off. Again in a COMPLETE DARK ENVIRONMENT, this is crucial to duplicate the issue.
3. turn on the Camera app and look at the screen.
After your eyes adjusted to the darkness, you will see a bunch of nasty scattered pixel blocks. It's like pouring inks on your screen.
This pic says it all. From forum member sunnyshirz from this post:
http://forum.xda-developers.com/showthread.php?t=1353324
View attachment 803916
Both my phones ordered from expansys-USA and Negri Electronics have the same issue.

I do this about 7 times a day, it has to be a common use case right?
Seriously, do you see the insanity of recreating this non-problem? Just think about it.
Sent from my Galaxy Nexus using Tapatalk

The screen image attached to the OP of this thread also suffers from the same issue:
http://forum.xda-developers.com/showthread.php?t=1366878&highlight=test
How many more of you have this?

I haven't checked mine yet. But I don't really use my phone in the closet with the lights off, so for me, and how I use my phone, my phone kicks ass
I did use it on lowest setting with light out in bed last night for a few mins, and saw no dots. So it probably has something to do with the camera and what it is seeing in total darkness. Since it is not an infared camarea, I see no problems with that either

I tried this and couldnt see spots, mine does have the right edge slightly tinted issue though. All amoleds have variations theres over 200 pages in the galaxy s2 forum.

Luxferro said:
I haven't checked mine yet. But I don't really use my phone in the closet with the lights off, so for me, and how I use my phone, my phone kicks ass
I did use it on lowest setting with light out in bed last night for a few mins, and saw no dots. So it probably has something to do with the camera and what it is seeing in total darkness. Since it is not an infared camarea, I see no problems with that either
Click to expand...
Click to collapse
If you set your wallpaper to black/grey you will see it at your home screen.
I spotted this issue when I was playing with my phone before bed, it is definitely not a Camera app issue, it's something hardware related. Like I said before your eyes need to adjust to the darkness in order for you to see those dots.
This is pretty annoying if you use your phone at night with all lights off.

[hfm] said:
I do this about 7 times a day, it has to be a common use case right?
Seriously, do you see the insanity of recreating this non-problem? Just think about it.
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
It's true that during normal usage in daytime you cannot see them, but I use my phone in dark environments a lot so this is crucial to me.

assisterah said:
It's true that during normal usage in daytime you cannot see them, but I use my phone in dark environments a lot so this is crucial to me.
Click to expand...
Click to collapse
I have used my phone in the dark a bit. Kindle app set on black bg with brightness turned all the way down is the largest. I always have the brightness all the way down when using phone at night in bed so not to bother the wife. Have seen zero issues.
Sent from my Galaxy Nexus using Tapatalk

[hfm] said:
I have used my phone in the dark a bit. Kindle app set on black bg with brightness turned all the way down is the largest. I always have the brightness all the way down when using phone at night in bed so not to bother the wife. Have seen zero issues.
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Yeah, I was using google books app last night in bed w/ no lights, set to night mode (black background). Saw nothing as well.

Check this site: http://fiddle.jshell.net/qfxsc/1/show/
Its the critical colour
My first nexus had many stripes from the bottom to the top but my second one is much better.

Sounds like a classic case of someone looking for a problem. If a person has to take all the steps the OP described to recreate a problem, then it isn't a problem. Nothing to see here.

mysterioustko said:
Sounds like a classic case of someone looking for a problem. If a person has to take all the steps the OP described to recreate a problem, then it isn't a problem. Nothing to see here.
Click to expand...
Click to collapse
This is correct. And I think an easy solution would be to put the brightness at 15-20% instead of the lowest so you don't see whatever it is you see

try installing dead pixel from the market then check it that way. My is solid black, no bleeds at all.
Sent from my Galaxy Nexus using xda premium

[hfm] said:
I do this about 7 times a day, it has to be a common use case right?
Seriously, do you see the insanity of recreating this non-problem? Just think about it.
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
This.
You can pretty much obsess over and examine any product long enough until the following realization occurs:
OMGDEFECTIEVE!!
It's really unfortunate that the OP cost the retailer/Samsung money going through a few phones for an obsessive compulsive microscope discovery about a real non-issue. Results in higher prices for everyone.
Ridiculous.

I think here's how you get to the bottom of this. Go online and google search absolute black. Save the 7th image on your phone. Then go to the saved image in your gallery and zoom in on the top left corner of the picture while in a completely dark room. If it looks weird, then your phone may have a problem, but if not, then STOP LOOKING FOR THINGS TO HATE.
This is a great phone, why try to ruin that. My guess is that the issue you're seeing is because of the camera. It's horrible in lowlight settings.

assisterah said:
3. turn on the Camera app and look at the screen.
Click to expand...
Click to collapse
I don't have a GN yet so can't replicate your method, but if it happens when you use the camera app, don't you think it could have something to do with the camera? The camera gain will be all the way up in total darkness which will produce weird pixelations.
If you're trying to get solid black on the screen to evaluate the display, I am sure there's an app that can do that. Or simply make a web page with all black.
[hfm] said:
I do this about 7 times a day, it has to be a common use case right?
Click to expand...
Click to collapse
Hah!

Same thing with my gsalaxy s2. There are also other "strange" effects on gs2 screen at lowest levels. I think I saw something like that at note subforum. So I guess it is more or less normal for every amoled screen.
I can reproducethis issue, but I never experinced it in day to day usage. It is no problem for me.

Ok guys. Thanks for all the negative comments.
If your phone has no problem then good for you. I couldn't stand for this issue because I can notice it fairly easy in low brightness condition, I have tried to increase the brightness to around 40% and I can still see it. And again this is not a camera caused problem. I first noticed this when I was using Google Music to play some songs at night. The problem pretty much exists under any pure dark background.
Please look at the pic I posted, Does this look like "normal" to you guys if you were in my shoes?

This is an AMOLED issue. Just keep the screen step above minimum and its completely fine. Phone is not faulty, that's how that screen works. AMOLED is also more noisy on lower brightness, that's not a faulty screen.

I don't have this issue. My screen looks great and is from Expansys. What do I win? Your phone does look pretty bad though, maybe exchange it again?

Thin green line at the top of the screen

Anyone experiencing thin line at the top of the screen it appears green at black background and as a brighter colour on different backgrounds
I'm wondering is it software issue or rather hardware one
Sent from my Galaxy Nexus using xda premium

That just started happening to me too...I think I've just gotten used to it - though it's still annoying. I haven't looked into/researched a fix yet.
Sent from my Galaxy Nexus using xda app-developers app

Can you post a picture? This seems very odd, I'm not sure if it's dead pixels or some other kind of glitch.
Sent from my Galaxy Nexus using Tapatalk 2

Is brightness control (or whatever it's called in the rom you're using) enabled perhaps?

It seems to come and go, worse at certain times. Right now I can barely see it, but I will post a screenshot as soon as it comes back.
Sent from my Galaxy Nexus using xda app-developers app

If it's hardware issue the screenshot won't show the line at all but if you can truly capture that line in a screenshot chances are it's a software fault.

Same here the line doesn't show up in screen shot
Could anyone who's experiencing the issue could post which Rom and kernel you been using?
I'm using modaco prebake and Franco kernel
Sent from my Galaxy Nexus using xda premium

You're right nothing showed up with the screen shot when it came back last night. I'm running the latest Bugless Beast 4.1 with the new radios.
Sent from my Galaxy Nexus using xda app-developers app

I've checked new Ron same issue
If you will go to landscape mode and watch a video probably you'll realize as me that the line is at the top and bottom of the screen. The u can notice that when you press navigation keys as well
Sent from my Galaxy Nexus using xda premium

Are you on a custom ROM and are you sure its not the battery option selected that shows a green line across the top of the screen? It changes depending on your battery percent.

I haven't really played around with better battery stats because I get pretty good charges out of the battery, but played a video earlier in landscape and the green line stayed in the same place - thinking hardware issue.
Sent from my Galaxy Nexus using xda app-developers app

Running stock Jelly been just noticed this today, have had the phone since June I think. Phone is always in its leather case/wallet with a screen protector so no phone damage.
And it has the same issue, green line or bright colors base on the background. just one line about as thick as the pull down notification bar. It got a bit better during the day, green line in portrait disappeared, now I just notice it when horizontal. but this is the first day.
Anyone send theirs in yet for repair?

I also noticed that on my GNex as well. Big probability that it's a hardware issue, like a line of dead pixels. Doesn't bother me much though, as it's so thin I sometimes don't notice it's there. But when my OC mode gets activated, it does seem distracting @[email protected]

Why not call Samsung for warranty repair? If you are under warranty, they'll let you know to send it in.
I called (888)987-4357 for my repair and they were actually really helpful. They're located in Texas FYI

Hi!
I had the same line. It can be clearly seen when the camera is turned on, or other apps in full screen mode. Line can be green, or red, or white.
Line appears for the first time when it was low temperature outside (-20 С, i think...), two weeks ago. I took the phone out of my pocket to read message, and saw the green line at top of display.
Now, if the phone placed in a warm room, the line becomes a barely visible. In a cool place it becomes clear visible.
Today I went to the service. They reinstalled the firmware, but the line is still on the display. They said that it is hard to see this line, and maybe they must to ask Samsung about this line. They are not sure that this line is a malfunction. At the same time, they are ready to replace the display (after arriving from Samsung's stock). Not clear for me...
I'll go to the service again in a week, and will report about result.
Good luck and sorry for my English.
Sent from my GSM Galaxy Nexus using xda app-developers app

I have the same issue. The Green Line on top appears when it's cold outside and normally its just brighter line which you can see only in landscape mode.
I think the only thing you can do is replace the screen
Going tomorrow to service and will let you know after
Sent from my Galaxy Nexus using Tapatalk 2

Hi!
I went to the service again. After four days my phone returned with a new display. The line has disappeared, everything is fine! :thumbup:
P.S. This repair was under warranty.
Sent from my Galaxy Nexus using xda app-developers app

I have a strange line on the top but i never saw it green. It looks like a line of pixels with different brightness.
update1: just sent my GN to customer service
update2: came back with a new full working screen

I have only noticed this when i viewed the video file on the computer using VLC. When i took a shapshot of the video, and then enlarged the picture to fit on desktop i could see the green line. It is only one pixel in width, not noticeable otherwise.
Is this really a hardware issue if it is happening to every GN phone in the same location ? I think it is software based. perhaps to make up the right pixel dimension ??

exidez said:
I have only noticed this when i viewed the video file on the computer using VLC. When i took a shapshot of the video, and then enlarged the picture to fit on desktop i could see the green line. It is only one pixel in width, not noticeable otherwise.
Is this really a hardware issue if it is happening to every GN phone in the same location ? I think it is software based. perhaps to make up the right pixel dimension ??
Click to expand...
Click to collapse
Definitely a vlc software error.! Isn't vlc on android platform still beta?
Try another player and look if you get the same result. There are enough you can choose. MX player for example is a famous one.
Sent from my Galaxy Nexus using xda app-developers app

Nexus display problem.

Hello
I`ve just noticed that my galaxy nexus has some wierd "ghost yellow menus" when everithing is white.
I have attached some pictures.
What can I do to get ridd of them?

Looks like screen burn-in, which is unavoidable with an AMOLED display. My GNex has similar banding from the notification bar, soft-key bar, and the address bar in Chrome (which is why I've stopped using Chrome and reverted to stock Browser.)
I don't know if there's a way to fix it, but the fact is that if you have a static image displayed on the screen, it will retain itself, much like a plasma TV.

Man I hate the blue burn in the notification bar and the nav bar
Sent from my Galaxy Nexus using XDA Premium HD app

Isnt it the rest of the screen that have some kind of 'burn in' Or more specific, the rest of the screen is degenerated/worn? The yellow hue wasnt present on my first GN when I got it. I have two GNs, the newest is more bluish/cleaner white - crisper..
Sent from my Galaxy Nexus using xda app-developers app

Same here.. I've got a blue ghost on the notification bar when the screen is white
Inviato dal mio Galaxy Nexus con Tapatalk 2

Andrei P said:
Hello
I`ve just noticed that my galaxy nexus has some wierd "ghost yellow menus" when everithing is white.
I have attached some pictures.
What can I do to get ridd of them?
Click to expand...
Click to collapse
You're holding it wrong

We all have this. It's common on GNex. just ignore it.

hp13 said:
We all have this. It's common on GNex. just ignore it.
Click to expand...
Click to collapse
If I can`t get ridd of it then What can I do to prevent it from getting worse?

Andrei P said:
If I can`t get ridd of it then What can I do to prevent it from getting worse?
Click to expand...
Click to collapse
Rotate the screen every now and then. If yoru phone is still under warranty, you can ask Samsung to replace it for you. Hopefully the new batch or SAMOLED are less prone to burn in.

If this common on sampled screens why don't I have this issue ?
Sent from my Galaxy Nexus using xda app-developers app

Streaker said:
Isnt it the rest of the screen that have some kind of 'burn in' Or more specific, the rest of the screen is degenerated/worn? The yellow hue wasnt present on my first GN when I got it. I have two GNs, the newest is more bluish/cleaner white - crisper..
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Yeah. The pixels of these displays wear out slowly but surely with use (and subpixels of a certain color - green, I believe, although I'm not 100% sure right now - wear out faster than the others), but since the notification and navigation bars are mostly completely black (meaning those pixels are turned off and barely get used at all) those areas don't get worn out like the rest of the display does. So it's not that the bars are "burned" into the screen, it's rather that those areas are in better condition than the rest of the display.

RoadHazard said:
Yeah. The pixels of these displays wear out slowly but surely with use (and subpixels of a certain color - green, I believe, although I'm not 100% sure right now - wear out faster than the others), but since the notification and navigation bars are mostly completely black (meaning those pixels are turned off and barely get used at all) those areas don't get worn out like the rest of the display does. So it's not that the bars are "burned" into the screen, it's rather that those areas are in better condition than the rest of the display.
Click to expand...
Click to collapse
This^^
:good:

RoadHazard said:
Yeah. The pixels of these displays wear out slowly but surely with use (and subpixels of a certain color - green, I believe, although I'm not 100% sure right now - wear out faster than the others), but since the notification and navigation bars are mostly completely black (meaning those pixels are turned off and barely get used at all) those areas don't get worn out like the rest of the display does. So it's not that the bars are "burned" into the screen, it's rather that those areas are in better condition than the rest of the display.
Click to expand...
Click to collapse
I was thinking that too but did you guys notice that when the screen is displaying back it is not absolutely black? The pixels do glow a little bit for faster screen switching (it was mentioned in some other posts). I think it could also be this static glow that causes the burn in.

What's this about a new batch? Did Samsung start using new displays with the GalNex recently?
Sent from my Galaxy Nexus using xda app-developers app

Sorry, I meant like a production batch. Don't thing they will use new displays with the Gnex.

I have insurance thru VZW which gives me a 2 year warrantly. I already had VZW replace 2 Gnex's, because of screen burn in, and if I get burn in again, I'll have them replace it again. They really don't give you a problem with replacing the phone, just tell them you did all like troubleshooting methods like factory data reset etc. and the burn in remains. They will send you a "like new" refurbished replacement. All the replacements I have got have been in great condition. If you are under warranty do not tolerate screen burn in, get it replaced immediately.

I've seen 5 gnex and each one of them had different screen. I mean every one looked different, worse or better. It looks like producing a good quality amoled display is very difficult or Samsung has very low QA for them... I wouldn't worry about it if I were you. Just use it... It's not that you often display static full screen gray background.
Wysyłane z mojego Galaxy Nexus za pomocą Tapatalk 2

ray3andrei said:
If this common on sampled screens why don't I have this issue ?
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Be happy you don`t have it!

ray3andrei said:
If this common on sampled screens why don't I have this issue ?
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
I think it's more common with the people who brag about their 3 or more hours of on screen time a day.
Those of us who are more like 30 mins to an hour a day of on screen time are not going to be affected near as fast.

its also for me
and also for most of nexus devices even nexus 4...
wierd...

vertical lines. blobs..etc

am i the only one that is noticing this? while its not as apparent as it was on t989, this phone seems to have blobs, vertical lines and other screen defects
link to the issue thread for t989
http://forum.xda-developers.com/showthread.php?t=1300133
ive went through 2 phones(one had physical defect) and both had this issue, so im going to guess its probably pretty widespread.
anyone wanna check their phones for these as well?
since blobs, lines are not acceptable on a 600dollar phone like this
To find the blobs/lines, look at grey background at night with no other lightsource than the phone itself.

Mine has a small line but it's like dead in the middle of the screen.
Sent from my SGH-T889 using xda app-developers app

RTFOP said:
Mine has a small line but it's like dead in the middle of the screen.
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
mine too, only 3 small blobs, and a line
the thing with these screens is that the oleds are controlled by a voltage regulator, and when you turn the brightness down the voltage regulator can't neccearily provide enough voltage to the screen, which causes the issue we have
i was hoping samsung would have fixed this issue by now..its a surprise that they havnt

just to add
this is the kind of technology samsung needs;
http://www.ignisinnovation.com/technology/ignis-technology-overview/ignis-maxlife-technology
and
http://www.ignisinnovation.com/technology/ignis-technology-overview/intelligent-pixel

AznDud333 said:
am i the only one that is noticing this? while its not as apparent as it was on t989, this phone seems to have blobs, vertical lines and other screen defects
link to the issue thread for t989
http://forum.xda-developers.com/showthread.php?t=1300133
ive went through 2 phones(one had physical defect) and both had this issue, so im going to guess its probably pretty widespread.
anyone wanna check their phones for these as well?
since blobs, lines are not acceptable on a 600dollar phone like this
To find the blobs/lines, look at grey background at night with no other lightsource than the phone itself.
Click to expand...
Click to collapse
People call it black crush it's known for anoled screens https://www.google.com/search?hl=en....0.89.255.3.3.0.les;..0.0...1ac.1.sJaoi5a2zrQ
Sent from my SGH-T889 using xda premium

deeznutz1977 said:
People call it black crush it's known for anoled screens https://www.google.com/search?hl=en....0.89.255.3.3.0.les;..0.0...1ac.1.sJaoi5a2zrQ
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
No, this is not black crush, the blobs and vertical lines are something else.
blackcrush does exist for these phones, but mura and vertical lines exists as well.

AznDud333 said:
.......
To find the blobs/lines, look at grey background at night with no other lightsource than the phone itself.
Click to expand...
Click to collapse
Real life you sit around in a dark closet looking at a grey screen? Maybe your being a little too critical? Just enjoy the damn phone. It rocks!
Sent from my SGH-T889 using xda app-developers app

danr238 said:
Real life you sit around in a dark closet looking at a grey screen? Maybe your being a little too critical? Just enjoy the damn phone. It rocks!
Sent from my SGH-T889 using xda app-developers app
Click to expand...
Click to collapse
i wish i could
having had an T989(tmo gs2)
initially the screen looks like what we have now
just look again in a year, the lines will become so apparent that youd want to smash your phone
in either case, it would bother a lot of people when they us their phone at night.
not to mention that this is a 600dollar device, it needs to be flawless!

AznDud333 said:
i wish i could
having had an T989(tmo gs2)
initially the screen looks like what we have now
just look again in a year, the lines will become so apparent that youd want to smash your phone
in either case, it would bother a lot of people when they us their phone at night.
not to mention that this is a 600dollar device, it needs to be flawless!
Click to expand...
Click to collapse
Nothing lasts forever. Get that through your head and you'll live a happier life.
Sent from my SGH-T889 using Tapatalk 2

llustig said:
Nothing lasts forever. Get that through your head and you'll live a happier life.
Sent from my SGH-T889 using Tapatalk 2
Click to expand...
Click to collapse
nothing does indeed, which is why im glad my credit card gave me a 2 year warranty on this phone
in either case, ive posted this so people are aware that this issue exists, should they take action against samsung

The 1st unit I had were free of dark lines; but I am confident that it had the mura effect as well but was much harder to find since the dots were concentrated on the edges (near the bezel) of the display; if you look carefully at all the T-Mobile note 2's, they all have the AMOLED issue. I did notice on my first unit extremely faint stains throughout the display just like in the demo unit (in black background), but the lines were not there and hardly any dots. However, the whites on my 1st unit were somewhat dull, not as bright as the demo unit at the store, and had a yellow tint on the 2nd half of the display, and a light pinkish hue to some extent at the center of the display in a full white background, and also had faint horizontal lines (only when looked carefully) at lowest brightness in a white background (which became worse and more prominent over time).
My 2nd unit, though it does have a 1cm black line in the middle of the display, with 3 or 4 dots on the top and bottom left of the display, the whites are true whites, and the display is much brighter than the 1st unit I had. No yellow tint to be found, no pinkish hue, and no faint horizontal lines at low brightness and white background! Surprisingly, the color and brightness uniformity are flawless on my 2nd Note 2 (throughout the display, white is white, even brightness) , compared to the '3' Galaxy S2's, '1' Note 1, and 1st Note 2 I owned in the past. Best of all, the build quality on my 2nd unit is also better, no squeaking bezel or back cover, and hardly any blemishes on the bezel. The light which was leaking through the home button is almost gone after a couple of weeks of use.
So far, it seems like my 2nd Note 2 is a safe and clear winner; really hard to find a unitform AMOLED display these days and my 2nd Note 2 just so has one.
Why send something back as a result of finding the slightest chance of a mura effect when you might get something worse in return.
Like many say on the forum, "I guess you can't get it all."

What to do, blue line & bleeding?

I received my G Pad yesterday, I noticed I have the blue line and some slight bleeding in the lower left of the screen. My whites are nice. Has anyone returned a defective one and received a replacement with no issues. Debating if I should deal with it or try again?
Sent from my LG-V500 using xda app-developers app

vulcaninvt said:
I received my G Pad yesterday, I noticed I have the blue line and some slight bleeding in the lower left of the screen. My whites are nice. Has anyone returned a defective one and received a replacement with no issues. Debating if I should deal with it or try again?
Sent from my LG-V500 using xda app-developers app
Click to expand...
Click to collapse
A picture would be nice. I didn't had the blue line on 3 of my white devices. But I think the 4th one has it. But not so obviously. It's more like a transparent line, that's a little bit brighter. Only seeing it from a really low angle. Not the front view.
On the bleeding, it depense. My device is from germany and almost everyone has it. And we think it's normal.
Reading here on XDA, people returned the devices with light bleeding. Saying it was defect. But only a really low % doesn't have light bleeding.

vulcaninvt said:
I received my G Pad yesterday, I noticed I have the blue line and some slight bleeding in the lower left of the screen. My whites are nice. Has anyone returned a defective one and received a replacement with no issues. Debating if I should deal with it or try again?
Click to expand...
Click to collapse
I would expect most G Pads to have the tiny little blue line and possibly some minor light bleed at very low light levels. Personally, I don't know why either of these would interfere with use of the tablet in normal situations. I would recommend that people who are contemplating buying a G Pad just assume that they will have these issues. If you happen to get one that doesn't have the blue line or some low-level light bleed, be happy.
Otherwise, the best bet is not to buy one if you're going to be haunted by these facts. That will free up a lot of time in the forums discussing this.

vulcaninvt said:
I received my G Pad yesterday, I noticed I have the blue line and some slight bleeding in the lower left of the screen. My whites are nice. Has anyone returned a defective one and received a replacement with no issues. Debating if I should deal with it or try again?
Sent from my LG-V500 using xda app-developers app
Click to expand...
Click to collapse
Can you install the back light bleed test app from the play store and snap a photo? I'm curious how bad it gets.

vulcaninvt said:
I received my G Pad yesterday, I noticed I have the blue line and some slight bleeding in the lower left of the screen. My whites are nice. Has anyone returned a defective one and received a replacement with no issues. Debating if I should deal with it or try again?
Sent from my LG-V500 using xda app-developers app
Click to expand...
Click to collapse
It really depends on you and what you consider acceptable. My first G Pad I took back for what I considered excessive light bleed in the top corners of the screen it also had the blue line. My 2nd one has next to no light bleed and also does not suffer from the low brightness level light bleed like some have. My 2nd one does have the blue line but to me that is not an issue I have seen it only a few times and only when using the video app watching a movie for over 30 minutes. During normal use I have never seen the blue line when I say normal use I mean pick it up for a quick check of mail, surf the web a bit watch a YouTube video or two and play a gave for a few minutes.

On my side no blue line so far, but i've got the light bleed on the bottom edge at low brightness.
Seeing so much people here sending back there tablets and receiving it with another issue, I've decided to contact LG customer care (French one). At first they asked me to send a picture off the defect, which I did... And here is the response:
We acknowledge receipt of your mail 12/23/2013.
You contact us because you found a defect in the slab on your tablet when the brightness is low.
Please note that this is not a defect but a normal phenomenon when the brightness is at minimum.
We remain at your disposal for any further request.
Click to expand...
Click to collapse
I'm not really happy with this answer. My first reaction was to root the device, install a custom recovery and flash the device with a descent ROM (CMB actually). I'm felling better now, since I can live with this... but IMHO it's still not "a normal phenomenon"
Cheers.