yashsingh1/xdaforums huggingface dataset:
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] jewelkobayashi:
https://www.dropbox.com/s/752546pt4n6l2o5/DSC_0426.JPG

[IMG="green dots"]https://docs.google.com/file/d/0B0evFuaLOvTBd3Y3UVp3TzlMY0E/edit?usp=docslist_api[/IMG]

This is the best I can do.

I used mx player, with max brightness.

When the brightness is set 3/4 of the way, it starts to become visible.

P.S. dumb question. How do people manage to paste pic direct in the posts?
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] degraaff:
Your screen also looks a bit distorted from looking at that playback bar. Yeah, you should just go ahead and get your tablet replaced, no hassle.

And wrap your image link between a tag. Or just use the image button in the reply editor.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
I noticed this problem too on my tablet but not to the same extent. Have you replaced yours?
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] jewelkobayashi:
Not yet, but I will. It has been a while since the original post, but I think it is getting worse. It has spread to a wider area. I contacted service center in Hong Kong and they told me that it should only take 3 hours to replace the lcd. So I will fly there nervy week and get it fixed.

Better to have it done while still under warranty..

I will report one done.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
I sent mine in but they did nothing at the problem. They sent it back within two days claiming there is no problem and that they had updated firmware (which they could not have done since I did it before I sent it in lol...)

I called support again and they in return will call the repairshop asking what they actually did to my tablet. Most likely (if everything turns out ok) I will have to send it in again (which is still is annoying) and hopefully they will notice the problem this time.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] jewelkobayashi:
Which County are you?

Not to defend Sony in any way, but it can be difficult to spot the problem when the screen brightness is anything below 50%.

I notice my problems in the following scenarios.

1) when I boot up the tablet, first the Sony logo. Here you can see it a bit because the background is black. But it gets a lot worse when moving into the next screen during 'Xperia'. Here the brightness is turned up, making it extremely noticeable.

2) when I am trying to watch a movie outside or in a bright place making my screen reflect, forcing me to turn the brightness up above 70% mark...

3) when I am using my tablet in pitch dark... Even in low brightness setting it can be noticed. Especially bad when the movie scene I am watching is for example night time and thus naturally contains a lot of black on the screen.

Anyway, thanks for your info. Before I submit my tablet, I will make sure the recipient sees and understand the problem and get that person to attach a note to describe it for the repair crew.

Judging by the lack of response to this thread, we seem to have encountered a rare problem.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
Im from Sweden.

Yeah well I thought I was pretty clear on my instructions regarding how to notice the problem but you might be right. Mine isnt visible much when in use (apart from dark background with 100% brightness) and in dark enviroments.

Right now Im waiting for Sony Xperia support to call me telling me what the next step is. They wanted me to take a picture of them problem however its good to get a good print (picture is easy but printing it is harder ;)).

I have seen another thread regarding this at Sony Talk forum but that might be you aswell? :)

/ Henrik
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] jewelkobayashi:
UPDATE

I flew into HK last night and went straight to Xperia care centre this morning.

I did not need to mention anything, I showed him the green dots (he called them dead pixels) and took it in immediately.

Judging by his reaction (his English was not very good) it was not the first time he had seen this on the Z2 tablet, and seemed to ask no further.

I showed receipt from purchase, he gave me a form to sign, and I was told to come back in 4 hours.

I came back after 4 hours, and everything was perfect.

I wasn't sure at the time, but it involves replacing the whole front display unit. The LCD screen and outer glass seem to be one piece, because everything was changed.

just a pain that the screen protector was gone with the old screen, so I needed to go and buy new, and that they had to factory reset... one click root and Titanium backup will come in handy...

All in all, my first ever Sony repair experience was professional, efficient and stress free.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
Glad to hear that everything turned out ok for you. I have sent mine back and it will soon be at the repair shop (i can track the package). Hopefully they will be able to spot the problem this time otherwise I will be mad.. ;(.

I will update the thread with the result!
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] superhyper:
Let us know how it goes! I have the same issue, but being here in the United States it will be difficult to send it back to an HK service center....
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] rokrd1579:
I have the same problem, im about to call xperia support cause, i need this fix this, i get my tablet to do my homeworks and projects, but mine is around all the lcd :( i hope they can replace mine :(
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] jewelkobayashi:
I just happened to have a business trip to Hk coming up so I didn't need to send it in, but when I initially discovered the problem and called Sony Hk, they told me that sending it by registered mail or FedEx was an option.

The Chap on the phone told me to start an email correspondence with support team, who would then provide me with step by step instruction on how to send my tablet in.

For me at the time it was not an option, only because the receipt/proof of purchase was left in my office along with the box in Hk...

Since my tablet was repaired in 3 hours or so, if things go smoothly you might get your tablet back within the week (although it sucks that you have to pay courier 2-way)
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
Just wanted to say that the 2nd time I sent it for service they replaced the screen and now it looks ok!

I had to write a detailed description of the problem and I also added a printed picture which showed the dots, aswell as a link to an uploaded img. I guess that made them realize.

Lets hope it can stay like this now...
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] nemidoff:
I just wanted to share about mine xperia z2 tablet.I had the same pixel problem, bought the tablet in abay Germany, got it to local service canter in Latvia. They got in touch with Sony and I got complete SWAP. For now it looks ok, I am usingthe new tablet for 2 weeks,lets see what will happen.:rolleyes:
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] martinbowden:
screen

Took mine in today for screen and constant reboots got a text saying it would be completed within five days but not what they were going to do so fingers crossed

Martin
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] HarpingOn:
It's not that rare, perhaps. I have the issue on mine in the UK, and this was a launch tablet direct from Sony online. Thing is, I'm convincing myself it only started appearing after a firmware update. Had anyone got this speckled screen issue with a ROM like CM? I don't want to install CM to find out, in case it needs warranty support
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] martinbowden:
update

They phoned this evening to check for proof of purchase and they had not started work on it yet makes me think they are going to replace unit I'm in UK and its on contract from vodafone but when I phoned vodafone they put me though to Sony who asked me to drop it in ?

Martin
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] HarpingOn:
Drop it in where? A Sony shop? Nearest is a 60 mile around trip :( how did you contact Sony support? Couldn't find a web way on their site
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] martinbowden:
Phoned vodafone and they transferred me to Sony help desk I live in Wales UK and there's a service centre near Bridgend but you have to go though Sony help desk first .Phone Sony UK

Martin

---------- Post added at 06:55 PM ---------- Previous post was at 06:50 PM ----------

‎0370-5237237 is the number on there web site

Martin
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] dpower-lv:
Hey, I'm also from Latvia and experiencing the same problem with my tablet Z2. I'd like to know which local service center you took your tablet to and how long it took them to replace it? Looking forward to getting mine replaced because it also arrived slightly bent with creaking noise issue from another thread...
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] martinbowden:
returned

Got it back today with a new screen well happy the reboots were Vodafone apps needed updating I'm told so fingers crossed

Same problem with rebooting as before but if I remove Vodafone sim it doesn't do the reboot problem so it's got tobe software issue
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] ironbyron:
Sony Germany (via w-support) exchanged the faulty screen within 3 days (!). Everything looks great. The frame somehow looks a bit different and might have been replaced as well.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] nemidoff:
MTTC Latvija aizvedu, atstāju, sākumā bija problēma komunikācijā,prasīja man pirkuma čekus, kuru man loģiski,ka nebija,jo pirku ebay no privātā lietotāja, beigās bija swaps,laikam 2 nedēļu laikā saņēmu pilnīgi jaunu.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] HarpingOn:
I got an email today saying the service centre received the tablet. Five day turn around. Here's hoping.

Has anyone else who had their screen replaced had the problem return?
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] martinbowden:
No mines been fine still struggling with random restarts but have turned off auto updates today and hasn't played up yet lol let me know how it goes with screen

Martin
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] RJASSI21:
I have the exact same problem gonna send it off when I got the time mine has green blue and red pixels all over and one completely dead near the bottom left i sent my old water damaged xperia z before all went well so should with this hope to get it fix soon
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] HarpingOn:
Got the tablet back today, posting this on it. New screen, and no dots. Looks different. I mean, the screen just looks... Different. Can't put my finger on it, might be a different kind or manufacturer of panel?

Going well so far, I'm in full on fiddling mode whilst I get it all set back up
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] KArl.Erik:
Hi,

I got the same green/blue dots a while back.

Sendt the device back to sony for repair. They now claim that the cause of the stuck pixels are pressure made on the screen, and it's my fault.

This is not the case.

Did you get a description of what they did? Something I can use in my case towards Sony?
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] wooly1:
Which country are you in?

Sony seem to have differing attitudes to screen issues in some countries.

I know in Australia they will not service screen problems at all, saying they are user caused.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] KArl.Erik:
Im in Norway.

Is there any chance this can be caused by presshure on the screen?
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] wooly1:
I don't know, but that will be Sony's response and probably wont be covered by warranty.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] nathlynn22:
I picked up a Sony xperia z2 tablet over the weekend been really wanting one for a while. Got it for £160 which I thought was very good. Its also the LTE version as well. I've already sent it off to Sony. I only had a hand written receipt from previous owner but hopefully that's enough. It had ALOT of green dots/specs while screen is black. Plus I noticed the back case creaks and it is in fact bent lol. Apart from that it did seem very good condition. And reasonable for the price as for a brand new LTE version its like £450
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] nathlynn22:
Update on my repair.

I noticed creaking, bending/warping & the green dots on black screen after buying it second hand.

Sent it off to Sony they have told me they have replaced the screen so far and he creaking is supposedly caused by the battery adhesive so going to sort that but added effect of having a curved screen tablet they have mentioned it is an understood flaw in the tablet and under certain specifications its deemed to be fine... Shall hopefully receive soon.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
The dots are back, hard to tell when but they are... Less than before the replacement of the screen but clearly visible when set to max brightness and dark background. Not sure what to do, sending it back is an annoyance to say the least :(.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] mru55:
Depending on the consumer laws in your country you may be able to return the device for a refund. But regardless, it is always best to negotiate with Sony support.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] RJASSI21:
I got mine repaired doesn't look different the same just without the speccy dots they also replaced my USB flap since I noticed it opening itself they replaced it but I still think it opens but oh well least the screens fixed
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Moscow Desire:
I've noticed the green cluster of specks, but it only shows after going from Bootloader to the boot animation. Seems it's only noticeable on a black screen. So you really can't see it as it only happens during a black screen, and to be honest, I don't stare at a black screen too much :eek:

I'm beginning to think it's software related rather than hardware, as I didn't notice it on the KK 4.4.4 build. Only after I went to the first LL release. Going to switch to the most recent release soon.

So it doesn't seem to affect any other colors, so I'm not worried too much about it as all other apps it is not noticeable. Perhaps in some games it may show if the game uses a predominant black background.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Skogstoken:
It is not software related, I got my screen replaced when the dots first appeared. When they replaced the screen the dots disappeared. Now they are back in a different pattern, I haven't changed the software since the screen got replaced.

Your dots will most likely get worse, mine did and eventually I could see them when them when tablet was used in a normal way.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] adam_rl:
Same issue - but different solution

I've had the green dot issue on my Z2 tablet for at least 5 months now. I've had the tablet new since August 2014 and is still under contract and warranty. After reading about other people's issues I went in to $networkprovider (AUS) and asked it to be sent away for repair. A few days later I got a call from them saying 'this will cost $650 to repair as the screen is cracked'. I disputed and said there are no cracks, it's in for a different issue. They said, no, the screen is cracked. I refused the repair and asked for it to be returned. Sure enough, I came in in today to pick it up and the screen is ruined. At least five large cracks on the screen, one piece even raised up almost out of the bezel. Certainly NOT the way it left the shop. The lady that served me looked over at it from another counter, then looked at the guy serving me and said 'that was NOT like that when it left'.

So it looks like my green dot issue will be fixed - with a brand new tablet :)

A
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] LeBoy:
Exactly same problem here: Tiny blue specs of light around the center of the screen only visible in dark backgrounds. Almost like a tiny picture of a starry night. My tablet is basically always on my bedstand and I never apply pressure to it. I'll try to contact Sony Support and see if I can have it fixed.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] LeBoy:
UPDATE: I contacted Sony and after a short phone call with a Help Desk agent they asked me to send the device back for servicing. I had the feeling the problem is not really unknown to them. Let's see what happens. I'm in Germany... :fingers-crossed:
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] LeBoy:
Update: I just got my tablet back fully repaired von Sony Support yesterday! I supposed they simply exchanged the faulty display panel. No questions asked. For the sending back they provided me with a pre-paid postal sticker and all in all the procedure didn't cost me anything. My device was purchased online on October 2014 and is obviously still under warranty according to their terms. The technical servicing was done by www.w-support.com in Germany and everything went smoothly. I'm happy again :)
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] mnky:
I noticed I had this issue as well as a yellowing around the edges. You could actually make out a perfectly square border on white backgrounds.

Thankfully my place of purchase (Argos, UK) have replaced the tablet with a new one as it was only 7 months since my purchase and Sony wanted me to post it to them. A one day turn around vs over a week seemed like a no brainer but now it seems this issue is not quite a one off so im going to assume its going to happen to my replacement eventually. A shame as I really like the tablet
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] VarHyid:
I have a question to everyone affected by this issue - do you use Sony's charging dock/station... thingy? I mean - this "stand" that utilizes the tablet's charging point at the bottom?

I have the exact same issue with my tablet and I think this started to happen since I began to use the charging station. I think it's such an interesting issue - I can understand why a single pixel or maybe a couple of pixels could die, but how is it possible that so many get stuck and they actually "spread"? Furthermore, how come replacing the screen or even the tablet not address it permanently for some people?

Now, I'm not a technician, but AFAIK, a pixel on a screen can get stuck either by applying too much force on the panel or by some electrical overcharge (?) which makes it stuck in the "on" or "open" state. Please correct me if I'm wrong. That said, I have never used any excessive force on the screen and frankly, given that it's covered by glass, unlike many regular monitors, I really doubt this is the cause for this issue. So let's think about electricity.

When I charge the tablet, I can feel it getting warmer roughly within the top-left area where the USB port and SD card slot is. So I've been thinking, what if there is some issue with the delivery of the electricity from the bottom charging point? What i mean is - how is the bottom charging point connected with the battery? Is there a wire running to the battery or the place where the battery is connected? Is it connected to the board and the charge goes through the appropriate paths/traces on the board? Either way, what if something along the way is badly isolated and it interferes with the panel causing electrical issues that make the pixels stuck?

Again - I have absolutely no clue what I'm talking about ;) so take it as a tinfoil hat crazy theory. Still, please let me know if everyone affected by this has been using the charging dock or even better - if anyone actually took this tablet apart - what is directly behind the mid- or mid-right area of the screen? I can't take mine apart as I need a working Android device for some testing, but the curiosity is killing me and I doubt any Sony rep would dare to publicly talk about this issue and what's causing it.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] WhyDeadPixels:
"excessive pressure" dead Pixels

Bought the z2 tablet 2 years ago in UK, as pre order with 3 year warrantee. A few months later yellow discoloration and dead pixels developed despite using official case.

A few similar reports on forums were around at the time but variable success with repairs so I held off long enough to see enough reports that this could be considered a manufacturing problem rather than "physical damage" and for them to start manufacturing better screens that could then be used in repairs.

After 2 years more and more dead pixels developed, so decided to send it in for repair under the 3 year extended warranty. Just received a receipt and request to call them for a "chargeable" repair. I'm expecting a similar conversation to what's been posted on the forum.

Given the numerous stories and repeat dead pixels, it's not worthwhile paying to have another screen that will breakdown. £25 to get it back from repair centre not repaired..

Really disappointed, had bought the noise cancelation earphones which broke quick too, but was still considering upgrading to z4 tablet in future, but with a growing and cementing reputation for poor customer service and build quality, I won't be buying anymore Sony products. It's a shame as I thought that they would concentrate on their existing mobile products after selling off their Viao line, but it seems that the Sony aren't going to learn from their customer feedback. Though i do respect that they do have a Sony Community and forum in the first place for us to share concerns, Why even bother to have it, if they aren't going to address issues?

This discolouration and dead pixel problem seems to have the largest volume of complaints on forums... .

I contacted the repair centre , and was informed that the charge receipt letter had been sent in error, and that there was infact no charge, and my tablet was with the repair technician already.

However Unfortunately I infact later received an e-mail 4 days later saying that there will be a charge as damage was due to "excessive pressure"

again poor customer service, mixed messages, unsure about getting further products from Sony.
[Xperia Z2 Tablet Q&A, Help & Troubleshooting] Moscow Desire:
Well, I feel for ya. Mine, and I can say it was never abused as with all my electronic gadgets, but mine also suffers the green pixelation generally only visible when a dark screen. I used the factory Sony cover from the start, and didn't use a "docking"station. It's formed into what is best described as a "cloud", but hasn't gotten worse in the past year.

My determination is the earlier 1st generation tablets had the screen flaw. In fact, when I pay close attention to it, it (the dots) appears to have the outline of a rectangle. Now, without looking at a service manual or taking it apart, I can only suspect this "rectangle" is most likely the same size as the battery? I suspect perhaps the battery getting warm during charging may be the culprit. Just a guess on my part, but the rectangle outline is suspicious at best.

As with Support, I would demand them fix it for free. Direct them here to XDA and they can read the countless reports and what other Sony Support has been doing to fix it.

I for one am pretty disgusted with my last two tabs, Acer A701 and this Sony 521. Both flagship tablets, and both with bad quality end products. Acer is prone to overheating CPU (Tegra) Hate to say it, but my next will probably be an iPad.