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Hi All,
Newb to XDA forums tough I have been following quite a few of the development threads for weeks now (OC Kernel, Phiredrop ROM, Tablet Tweaks, etc...). First I must say I'm super impressed at all the development being done for the Nook Color, us NC owners are definitely blessed to have an active XDA community full of brilliant developers!
But here's my first question about the Nook Color, has anyone noticed that some Nook units have a whiter/brighter screen than others?
Long story short is I've gone through about 5 NC units bc of various problems and have noticed that two of the five units I've been sent so far have noticeably whiter and brighter screens than the other three. This is with the brightness setting set at the same level on each Nook. It might be a color temperature or RGB setting difference between them, but I have no clue how or why they would be different since they were all factory fresh units. Does anyone know if Barnes at some point changed color settings (within kernel?) or started using different IPS LCD parts during manufacturing at some point? I did notice that the two I had with whiter/brighter looking screens had serial numbers that started with 20111, while the others had SNs that started with 2010 or 20110. Maybe they made some settings or parts changes during the newer production runs?
I know a lot of you might be thinking I'm not judging them under the same lighting or that the brightness settings are set to different levels, but I assure you that I am placing them all next to each other and always set them to the same brightness level for comparison. Admittedly, I am a bit particular about how the quality and appearance of my LCD screens, but even my girlfriend who is not a big tech person can easily tell the difference between the screen by looking at them from a few feet away. She instantly picks out the one that has whiter whites and appears "brighter" (again with brightness set at the same level).
Of course if you don't have two of these units next to each other for comparison it might be hard to see the difference relative to one another, but I can assure you the screen whiteness differences are there between some units. Wondering if there is any way for us to control these settings via kernel changes or some other changes (color temp, hue, RGB)? My problem is that I currently have a perfect unit that has the dimmer screen, and a brighter unit that has a dead pixel and am trying to decide which I should keep and which I should return. I actually prefer the colors and appearance of the one with the whiter screen but get distracted knowing there is a dead pixel. So it's a tradeoff. However, if i know I can change the colors of the screen and make the good unit look whiter/brighter down the line, I will definitely keep that one.
Any thoughts/advice would be much appreciated.
Thanks!
anyway u can post a high def video of this? would help on what your seeing. my nookn color is def a lot yellower than my other devices. but never saw a nook that's whiter than the other
I can try to take a video tonight, but not entirely sure if the color/brightness differences will be captured on the video but i'll give it a shot.
I tried not to use the term "yellow" in my initial post since whiteness level is relative, but that's basically how my gf described it - "That one looks yellower than that other."
yeah, i find whites on my nook very "yellowish" compared to my phone.
too bad there's no settings to change the color temperature on the nook.
Actually, that was one of my questions. Is there any way to change the color temperature of the Nook LCD screen or something along that line via the kernel? I have no clue about kernel parameters, but was hoping someone like Dalingrin, the resident kernel guru, might be able to answer this question? I think I've seen some ppl create apps to update color settings in the kernal for android phones.
I have an NC with serial number started 2004, which has very beautiful screen, but just three dead pixels. so I called B&N to have a replacement, and yesterday, the new one arrived (serial number 20112..). When I have both devices sitting next to each other, I can instantly tell the new one is VERY VERY yellowish (or say, the color is way too warm).
I have to call B&N to have another replacement, and the representative told me the yellowish is a known issue, though happen rarely. My personal experience can tell that even the newer devices may still have the yellowish problem.
There goes my theory about newer serial numbers. Have no clue why some units are yellowish and some a nice white then. But so far out of all the units i've got the ones that had whiter screens all seemed to either have dead pixels or some dirt or other particles stuck underneath the glass, and the ones with the yellowish screen seem to have no other screen defects. Probably luck of the draw, but I've got some pretty bad luck so far then. Love the NC, but I'm thinking the quality assurance is pretty shabby at this point.
RL_Droid said:
Long story short is I've gone through about 5 NC units bc of various problems....
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Sorry if this is OT, but this is the part of your post that most caught my attention. What the hell are you doing to those poor Nooks? ;-)
But seriously--what the hell?
Lol... as mentioned, two had dead pixels one of them the pixel were dead center, one had dirt under the glass, another had a loose back and a yellowish screen. Now trying to decide which of the two I have left to keep. The one with one dead pixel on the right side but a white screen, and the other that has a yellowish screen but no other issues at all.
I hear u with the yellow tint. had this next to my bros Ipad 2. and the nook was embarrasingly yellow. and my apple fan boi bro said it looks like a macaroni n cheese screen.
Our first had a definite "yellow" tint to it. VERY hard to notice, but I seem to notice every imperfection. Exchanged it and the second looked better. A friend of mine bought one and it had the same yellowish tint. Doesn't bother him though. Says he doesn't see it.
Are you running the stock rom/kernel? I know on CM7 there's definitely a more yellowish tone to the screen than on Nookie Froyo or the stock rom.
RL_Droid said:
Lol... as mentioned, two had dead pixels one of them the pixel were dead center, one had dirt under the glass, another had a loose back and a yellowish screen. Now trying to decide which of the two I have left to keep. The one with one dead pixel on the right side but a white screen, and the other that has a yellowish screen but no other issues at all.
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Didn't realize there was such inconsistencies with the NCs regarding color temp until I read this thread. Without being able to compare screens I have no problems with mine as it seems pretty good to me, serial 2010xx dated Feb 2011.
I guess I was lucky that the one I bought had a good screen without a single dead pixel. That was the only thing I checked as it was the most important thing to me. Couldn't care less about any other cosmetic issues. Build quality was better than I expected for something of this price, but recently the left side of the bezel has started to creak annoyingly when I hold it.
Definitely can't compare to those tablets twice it's price. But AFAIC, it works very well and with the phenomenal dev support, a Nook running CM7/OC can't be beat.
If I were you, I'd return the one with dead pixel. Built into CM7 there is "Render effect". Besides the night modes, there are some basic calibaration profiles in there. Maybe one of them might make your screen a bit "whiter".
edit: I just checked and it seems all the N1 profiles made my screen seem warmer. I suppose a few more profiles can be implemented, perhaps you should start a petition to the devs?
So I was reading about some of the problems with screen separation and had a question.
My device showed up and looked perfect except for a tiny(tiny!) part of screen raised about a hairs width on the left side. Had it about a week now with moderate-heavy usage, and haven't noted more separation, still less than a hairs width.
Now it may be splitting hairs (lol!) but I was wondering if I should attempt an RMA? Will it begin to separate more? Besides this everything is great, no dead pixels etc... and little screen thing doesn't bother me, but I don't want it to get worse and then be stuck with the device outside my window for RMA.
Thanks in advance!
Oh, my, I wouldn't replace it for that. Now, I think you COULD, technically, because yes there's always the chance that it will get worse. But if it does, you can deal with it as a warranty issue then.
If my first unit had only had the small amount of screen separation and not a dead pixel RIGHT in the worse spot, I would have kept it in a heartbeat. The second replacement I received has more separation, and also a screen with a horrible color temp--whites are a dingy yellow, quite ugly. The worst thing is, Google is telling some folks (me included) that we MUST return the original unit rather than deciding to keep it and returning the replacement.
Hell, if they'd let me, I would have kept my original, dead pixel and all, rather than take a chance on getting a third one with other problems (including the yellow tint, which I simply hate on tablets). Instead, I had to process another replacement which will hopefully get here tomorrow and be in good shape. Fingers crossed.
So, in short: if all that's wrong with yours is a tiny amount of screen separation, then for your own sanity I strongly recommend that you keep it and not worry about it. Stick it in a case and you'll forget about it quickly enough.
balorok said:
So I was reading about some of the problems with screen separation and had a question.
My device showed up and looked perfect except for a tiny(tiny!) part of screen raised about a hairs width on the left side. Had it about a week now with moderate-heavy usage, and haven't noted more separation, still less than a hairs width.
Now it may be splitting hairs (lol!) but I was wondering if I should attempt an RMA? Will it begin to separate more? Besides this everything is great, no dead pixels etc... and little screen thing doesn't bother me, but I don't want it to get worse and then be stuck with the device outside my window for RMA.
Thanks in advance!
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My first one was not significant, but with use it became very pronounced. The first replacement arrived with a fairly pronounced 'hump' on the left side of the screen. I don't think anyone is 100% sure what the cause is, but there are likely two reasons: the screws and the adhesive.
If the separation gets worse with significant use (i.e. heat), then it's probably an adhesion problem. If there's separation, but it appears to not get worse, maybe that's purely due to the screws? I don't know, just guessing.
As yours hasn't become worse with a week's moderate to heavy use, it seems unlikely it might suddenly change. However, if you're like me, the anxiety of not knowing will drive you up the wall.
So far, Google seems contend to keep sending replacements until I'm happy - my third device (AKA second replacement) should arrive this week. However, I don't like asking for replacements, I find it to also induce anxiety, so I'm really hoping the new N7 is going to be perfect.
My 4th and 5th Nexus both have exactly the same separation you describe and I've just put them both in a tight case a bought from amazon and not looked back.
Sent from my Nexus 7 using xda app-developers app
balorok said:
So I was reading about some of the problems with screen separation and had a question.
My device showed up and looked perfect except for a tiny(tiny!) part of screen raised about a hairs width on the left side. Had it about a week now with moderate-heavy usage, and haven't noted more separation, still less than a hairs width.
Now it may be splitting hairs (lol!) but I was wondering if I should attempt an RMA? Will it begin to separate more? Besides this everything is great, no dead pixels etc... and little screen thing doesn't bother me, but I don't want it to get worse and then be stuck with the device outside my window for RMA.
Thanks in advance!
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Mine came last Friday (7/27) and is exactly like what you describe. I’m not going to do anything about it unless it gets worse.
Valkyrie77 said:
Mine came last Friday (7/27) and is exactly like what you describe. I’m not going to do anything about it unless it gets worse.
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Beware though unless you bought through the play store you may need to deal with Asus for the warranty claim.
balorok said:
So I was reading about some of the problems with screen separation and had a question.
My device showed up and looked perfect except for a tiny(tiny!) part of screen raised about a hairs width on the left side. Had it about a week now with moderate-heavy usage, and haven't noted more separation, still less than a hairs width.
Now it may be splitting hairs (lol!) but I was wondering if I should attempt an RMA? Will it begin to separate more? Besides this everything is great, no dead pixels etc... and little screen thing doesn't bother me, but I don't want it to get worse and then be stuck with the device outside my window for RMA.
Thanks in advance!
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Click to collapse
Mine had a very slight raise on the left, I still did the whole "washer" trick which initially improved it, but I'm not sure if it was even worth it.
The other thing to check for is "flicker" - on auto brightness (particularly in a low light situation), open up Maps, and see if you see any slight flickering. I have this issue, but turning off auto brightness and setting it to about 30% seems to alleviate the issue.
Otherwise, my device is working extremely well - I wouldn't want to RMA for these very slight issues because I couldn't guarantee I wouldn't get something worse.
plambda said:
The other thing to check for is "flicker" - on auto brightness (particularly in a low light situation), open up Maps, and see if you see any slight flickering. I have this issue, but turning off auto brightness and setting it to about 30% seems to alleviate the issue.
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This whole "flicker in Maps" thing fascinates me, because I swear I've had it on every Tegra 3 tablet I've tried (Transformer Prime, Excite 10, Excite 7.7, Nexus 7). The absolute worse was the Transformer Prime, and it wasn't limited to lower brightness levels.
That really leads me to believe that it's something inherent in the Tegra 3.
wynand32 said:
This whole "flicker in Maps" thing fascinates me, because I swear I've had it on every Tegra 3 tablet I've tried (Transformer Prime, Excite 10, Excite 7.7, Nexus 7). The absolute worse was the Transformer Prime, and it wasn't limited to lower brightness levels.
That really leads me to believe that it's something inherent in the Tegra 3.
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I've heard this from several people now - although there are others reporting they don't have this issue at all with the N7, which is why plenty of people are sending theirs back for replacements. I would have to see a steady stream of "sent mine back, new one has no flicker issue at all" to consider doing an RMA for the problem. Because for me it just isn't that much of an issue, really.
I just returned a 16gb back to Staples and ordered one from Google Play. The screen was very dark and dingy. Whites were yellowish. The colors looked very washed out compared to my other Android tablets.
I didn't have any separation that I could find though. The silver ring was slightly raised all around the unit and my screen protector fit right inside there to make it flush. I just ordered a new one through Play store, so I'm hoping I don't go from bad to worse.
I'm onto my second Nexus 7 now due to screen lift. The last one I bought from Tesco and this one I bought from Carphone Warehouse. I did all the relevant tests for a defect when I opened it but a couple of hours later I realised that I have a really minor case of ghosting, I have to leave it on one screen for a while and it only ghosts the bottom third of the screen. I can live with that. Last night I also noticed a black idle pixel which is dead. That annoys be but its only visible if I look closely. I also have the tiniest bit of screen burn on the top left side but that's alright, to me. If I put pressure on the left side of the screen it has a sort of burn that is not unlike the one you get when touching a television. Also the colours are really washed put in comparison to the Galaxy S2. I know that the S2 is oversaturated but its not just a little bit. The green background in 'dead pixel test' is a pale lime, almost white in comparison the S2 is a deep lime green colour like the 'crazy Sour' skittles. I obviously have a few options:
I could keep it - gaming is fine and fun
I could get a replacement from CPW at the risk of the other one also having issues
I could refund and get one from Google Play
I could refund and buy a dishwasher (Dead serious)
What do you think? Anyone ordering from Google Play recently have any issues? I heard they're "clean". Thank you so much.
I got mine from the Google play store and it does have some very slight ghosting, but i kinda expected it for a device like this. I dont really notice it when watching movies or playing games.
As for your burn in issues, i think you should get a replacement as that shouldnt be normal
You poor thing.
Sent from my Nexus 7 using Tapatalk 2
I think I'd give it a little bit of time to see if it goes away on its own. New Screens are sometimes prone to minor issues like that. I would see if it still persists close to the end of your return window. Just my 3 cents on what I'd do.
So I have posted a few times and returned 2 Nexus 7's for slightly off color tones purplish blue link colors on Google and innacurate whites as well as some trailing or blur. No screen lift.
http://www.youtube.com/watch?v=HpqfMlWup18 I can't stand the yellowish tint from the one on the left.
Well yesterday I was at Staples with $15 gift card from trading in my used inks and I see a UPS delivery guy come through, I know from Past expereinces UPS delivers the Nexus 7 to Staples.
And So I asked if they had any new Nexus 7's at first they said no but then I pointed out the UPS delivery and a new shipment had just come in of 8GB models.
so for $199-$15= $184 I got my new Nexus 7, I would have not bought it but when I looked underneath and saw the new C80K CSSN I had to go for it.
I get home and I unbox Perfect no dead pixels, Or light bleed, today I compared it to an iPad 3 at the Apple store, and the colors are exact spot on. No off tones greens are not pale or off tint, white is white not blueish. Of course the iPad 3 colors are slightly Vibrant, but you can only tell if side by side. What I wanted was color accuracy, and previous Nexus 7's lacked that. Not sure if this is a new Hynix IPS LCD or the new ones made by SHARP, It has to be IPS by SHARP, because there is no ghosting and even touch response is faster.
Regardless, Google must have really got on ASUS's back to inspect more units per each thousand shipped. Or they sourced some better components.
thanks for the video killa.
i'm still hesitant to pick up a C80 model as some people are reporting defects with those.
maybe should wait for C90.
lol
I justed picked another one up today too and its a c80 but it still has slight screen lift on the left side. I personally dont believe this very minimal lift is a flaw. You can only tell its slightly lifted when you do the horizon test so all is good in my book!
IceColdKila said:
So I have posted a few times and returned 2 Nexus 7's for slightly off color tones purplish blue link colors on Google and innacurate whites as well as some trailing or blur. No screen lift.
http://www.youtube.com/watch?v=HpqfMlWup18 I can't stand the yellowish tint from the one on the left.
Well yesterday I was at Staples with $15 gift card from trading in my used inks and I see a UPS delivery guy come through, I know from Past expereinces UPS delivers the Nexus 7 to Staples.
And So I asked if they had any new Nexus 7's at first they said no but then I pointed out the UPS delivery and a new shipment had just come in of 8GB models.
so for $199-$15= $184 I got my new Nexus 7, I would have not bought it but when I looked underneath and saw the new C80K CSSN I had to go for it.
I get home and I unbox Perfect no dead pixels, Or light bleed, today I compared it to an iPad 3 at the Apple store, and the colors are exact spot on. No off tones greens are not pale or off tint, white is white not blueish. Of course the iPad 3 colors are slightly Vibrant, but you can only tell if side by side. What I wanted was color accuracy, and previous Nexus 7's lacked that. Not sure if this is a new Hynix IPS LCD or the new ones made by SHARP, It has to be IPS by SHARP, because there is no ghosting and even touch response is faster.
Regardless, Google must have really got on ASUS's back to inspect more units per each thousand shipped. Or they sourced some better components.
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In regards to N7 screen vibrancy I think it's possible for someone to release a contrast control app. I was playing with a photo in a photo edit app and was using the contrast tweak and it is was possible achieve more contrast and made colors pop-out more. Someone serious needs to make an app.
My C80 is flawless.
I don't think there is anything different about the C8 production run.
I had screen lift, which was getting worse so I returned it.
Color production was fine for some colors, bad for some especially green (looked washed / pastel colored). White production was great on my model, blues were good as well.
Speakers were pretty bad, worked decent but at about 85-90% during video playback and music it sounded distorted / crackling.
SPreston2001 - When I received my Nexus 7, C8 I had ZERO screen lift. It gradually came and got worse. Got to the point where it was actually spongy and I could see/feel it move when pressed. Had it on the left side, and on the top left.
Well I would imagine that the don't wait until the next month to make changes. Perhaps quality changes were made in the middle of August, and some have good ones, others don't.
I just ordered mine, so I have fingers crossed.
NickS VR4 said:
Well I would imagine that the don't wait until the next month to make changes. Perhaps quality changes were made in the middle of August, and some have good ones, others don't.
I just ordered mine, so I have fingers crossed.
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Lol I think people are getting their hopes up! Like 145ty said, I personally dont think any changes were made...
SPreston2001 said:
Lol I think people are getting their hopes up! Like 145ty said, I personally dont think any changes were made...
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Honestly I think that too, but I was making a point that the serial just indicates the month, does not indicate that changes were made.
I would imagine that once production is in full swing and the product is released, its not easy to fix problems and keep up with demand.
I went through a number of N7s and rejected quite a few because of the yellow tint.
However, my very first N7 ordered during Google I/O had the same color quality (without the yellow tint) as my latest C7OK unit. In other words, this isn't something that's new to the C8OK, it's really the luck of the draw in general so far.
I think it must be a hit-or-miss in all production runs. My C7OK is perfect.
So let me get this straight....
Having a screen with a slightly yellowish tint - we aren't sure if that is a factory defect that warrants returning?
I only have one Nexus 7, so I can't compare it apples to apples, but I believe mine has a slightly yellowish/warm tint. To be honest I'm not too bothered by it and believe that it makes reading easier on the eyes, but if you guys think that this is a defect, I would think twice about returning it because of that.
I'm still on the fence about whether to return it because of the screen lift problem (about 1mm at most), but combined with this I would certainly think twice about whether or not I should get a later production model. It's not like I would return it because everyone says so, but I certainly don't want something defective if it would lead to problems later down the road, as I plan on having/enjoying this tablet for quite a long time.
marcucci217 said:
So let me get this straight....
Having a screen with a slightly yellowish tint - we aren't sure if that is a factory defect that warrants returning?
I only have one Nexus 7, so I can't compare it apples to apples, but I believe mine has a slightly yellowish/warm tint. To be honest I'm not too bothered by it and believe that it makes reading easier on the eyes, but if you guys think that this is a defect, I would think twice about returning it because of that.
I'm still on the fence about whether to return it because of the screen lift problem (about 1mm at most), but combined with this I would certainly think twice about whether or not I should get a later production model. It's not like I would return it because everyone says so, but I certainly don't want something defective if it would lead to problems later down the road, as I plan on having/enjoying this tablet for quite a long time.
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No I can tell you right now the c80 units look no different screenwise than earlier units. Maybe others had bad/defectives screens but my c70 looks identical to two other c80 units I just recently purchased. The color issue more likely can be corrected with software tweaks so dont sweat it. Every unit ive seen had a slight yellowish tint including the display models I played with at Staples, Walmart, Best Buy, etc. Enjoy the tablet for what it is and dont give yourself a headache by looking for reasons to return it.
I think they are all the same screens but they aren't tuned properly. Custom Kernels will tweak the color so that they pop more (Trinity does this). I notice a big difference with my screen colors by using EOS rom (comes with a Trinity kernel).
I have been through all of this with my Samsung galaxy nexus, I went through 3 of them, till i found one I liked. It still was not perfect but gave up after that, some had purple tint, one was blue tint and other had yellow tint, some had vertical banding.
I think what it comes down to with electronics specifically all these screens, no two devices will look identical. I am not 100% sure or know why.
My C80 had one dead pixel other then that worked fine, but I noticed it right away since right in center of screen, I exchanged it and this time got no dead pixels, screen looks perfect, I am sure if I look hard enough I can find something wrong somewhere but I won't because once I do hard to go back.
So mine just came in the mail. I placed the order on Friday night... hot damn. That's a total of 1.5 business days to delivery. But that's probably just because my university gets orders in clumps.
Anyway, I was sad to see that the box said the model number was a C7O. Even before I opened it I assumed that meant something was broken, something was wrong, pixels would be dead, the screen would be falling off, etc. I was really really hoping for a C9O.
So I unbox it and everything seems to be going well. Setups was fun and easy. It's charging now. No dead pixels, and if the screen is higher on one end than the other, it's literally by fractions of fractions of a millimeter. I can feel a difference by running my finger over each end, but it's so minuscule that I doubt this is the "screen lift" problem people have been talking about. My Transformer had a bigger difference in screen height than this.
The screen looks fantastic. I'll try to look for flickering or dead pixels or bright pixels tonight when it's darker. But right now everything is hunky-dory, despite the fact that it's a C7O and not a C9O.
Not sure if this thread will really be of value to people. I'm just kind of chronicling my progress with the device, from unboxing into the future. And just letting people know that, right now, as of 1 hour after unboxing, everything is going fine. I'll post an edit if I come home tonight and the screen has magically lifted up half an inch, or if nine pixels die on me, or whatever.
Why would anyone except a C9O from the play store or any website? If anyone really wanted a C9O, they would buy it from Walmart or Staples and physically check the numbers on the box.
Im also confused what is this thread all about? The last thing this forum needs is more screen lift threads.
Sent from my SPH-L710 using xda premium