SOLVED - Xperia Z Ultra - LCD Screen Issue while TURN ON - New Problem - UPDATE 8/15 - Sony Xperia Z Ultra

I've had my XZU for a week now, everything has been working fine so far. Nonetheless I've noticed lately that when I turn it on I will see like a curtain or shade of colors from the top down up to half of the screen (it's like a flash, quickly disappearing), apart from that it will resume from sleep fine and no other issues, nonetheless is weird that this is happening now after a week of usage, I hope is not a symptom that something worse is about to happen. I have attached a Youtube link to a short video I just recorded.
NOTE: I do not think is a software problem because I booted the phone is "safe mode" and the exact same thing happened. It seems like a hardware issue that gets worse over time, because at the beginning happened once out of 4 times I turned it on, now is once every two times. I do not see a very good future with this phone
http://youtu.be/1ZucFrMvg_w
UPDATE 8/15: All my screen issues have been fully resolved with FW .475

So we have our own thread for the curtain now.
Sent from my C6802 using XDA Premium HD app

I think the issue is Power Management related, let me explain. If I turn on the device after being idle for a while (device is COLD) there will be no curtain issue, but if I turn it OFF and then ON right away (device is WARM) it seems the phone is entering a power save state and is not ready to be powered on again and that's when you get the curtain issue. The result seems to be very consistent with my explanation.
What I do not understand is that why this problem started happening after one week of usage, I thought it was application related but after my "safe boot" mode where no new applications are running only stock apps and I got the same result it can be application related. Also I thought that maybe the Stamina Mode had something to do with it, but it does not.
My last theory is that there is a piece of hardware that is getting degraded over time and when the phone is warm it will produce the curtain effect, if that's the case this is really bad, because the whole phone could stop working down the road. but it's just a theory.

Oh man

My experience with similar LCD issues has been around poor connection between the LCD screen and the motherboard. However, I'm by no means an expert on this.
I would definitely be claiming under the warranty for this.

I spoke with the vendor in Singapore and told me this is a known problem by Sony and they are working on a Firmware update. They suggested to keep the phone until the FW will be released in September and then decide if I will exchange it or keep it. The vendor also extended the Return/Exchange window until October so I will have enough time to test the phone after the FW update.
It's good to know that Sony has acknowledge the problem and is working on a solution.

Any chance Sony will do a firmware update to resolve this?

So it might be a firmware issue? I sure hope so
Sent from my C6802 using XDA Premium HD app

UPDATE 2
I think the problem is Power Management related, because if I leave the phone idle for 5min and then I turn it ON it will happen the issue you are seeing on the attached video. But if you turn it OFF and immediately turn it back ON again it will be fine. I think what is happening is that after 5min the phone will enter into DEEP POWER SAVE. The threshold to enter power save mode is around 15 seconds. I would say is something that should be able to be fixed with a Firmware update, but my only concern is why this problem did not happen during the first week, that behavior makes me think it's a Hardware problem that developed over the first week of usage, meaning a defective device.
NOTE: As you can see at the beginning of the video the phone has been Factory Reset, so there are no third party apps and anything wrong on the configuration.
http://youtu.be/vgnILc3ib8M

Mine did it the first day. I noticed it did it about 3 times that day. And I agree with you it might be the power save mode. Hopefully it gets resolved.
Sent from my C6802 using XDA Premium HD app

my phone has a problem too
http://youtu.be/Jv-QkbZBi58

Watch my video..
yellstop said:
http://youtu.be/Jv-QkbZBi58
Click to expand...
Click to collapse
I got a XPERIA Z ULTRA TODAY and I didn't install anything.
but When I push the power button, this phone wake up randomly.
after factory reset, this situation is same continuosly
http://youtu.be/pig1BurDaGw

brosenz said:
I've had my XZU for a week now, everything has been working fine so far. Nonetheless I've noticed lately that when I turn it on I will see like a curtain or shade of colors from the top down up to half of the screen (it's like a flash, quickly disappearing), apart from that it will resume from sleep fine and no other issues, nonetheless is weird that this is happening now after a week of usage, I hope is not a symptom that something worse is about to happen. I have attached a Youtube link to a short video I just recorded.
NOTE: I do not think is a software problem because I booted the phone is "safe mode" and the exact same thing happened. It seems like a hardware issue that gets worse over time, because at the beginning happened once out of 4 times I turned it on, now is once every two times. I do not see a very good future with this phone
http://youtu.be/1ZucFrMvg_w
Click to expand...
Click to collapse
My Z Ultra does exactly the same thing but it does not worry me. Seems to be a software glitch that should be easily fixed.
Mine happens when i am taking calls and i turn the screen on or off. Other times it is random but normally when i have been using the device for a period and then turn the screen on and off quickly after using it.
But yeah, i do not think it is an issue to worry about. If it was serious, surely the screen would be having issues a lot more when it is on and not under these specific situations?

ScottishSwan said:
My Z Ultra does exactly the same thing but it does not worry me. Seems to be a software glitch that should be easily fixed.
Mine happens when i am taking calls and i turn the screen on or off. Other times it is random but normally when i have been using the device for a period and then turn the screen on and off quickly after using it.
But yeah, i do not think it is an issue to worry about. If it was serious, surely the screen would be having issues a lot more when it is on and not under these specific situations?
Click to expand...
Click to collapse
If it's a software problem how is it possible that during the first week the phone worked fine?, even after a factory reset the problem will still be there, that means (to me at least) that a hardware issue develop during use for the first week and now it cannot be recovered

brosenz said:
If it's a software problem how is it possible that during the first week the phone worked fine?, even after a factory reset the problem will still be there, that means (to me at least) that a hardware issue develop during use for the first week and now it cannot be recovered
Click to expand...
Click to collapse
seems to me like the screen is not getting enough power for the first couple of seconds
douse this problem also happen if u disable stamina mode :?

dragnar said:
seems to me like the screen is not getting enough power for the first couple of seconds
douse this problem also happen if u disable stamina mode :?
Click to expand...
Click to collapse
I've tried both scenarios Stamin ON and OFF, same result no difference

So far the new update looks to have fix the curtain
Sent from my C6802 using XDA Premium HD app

Update:
2 days ago I left my ZU on charge all night and today updated to firmware 14.1.B.0.475 and touch wood no more screen issues, and finally my cover arrived just need the sbh-52 and dock and I am all good.

Do a factory reset with full wipe!!!
For make sure you totally wiped that garbage bro

Related

Razr touch screen randomly not responding

I had my razr for about 2 weeks, and this problem already happen to me a few times.
The touch screen will suddenly not responding to ANY touch, only the the buttons are still working(include the 4 buttons on the bottom).
I had to hard reboot my phone to get it working again.
Does anyone face the same issue?
Sent from my XT910 using XDA App
WongJames said:
I had my razr for about 2 weeks, and this problem already happen to me a few times.
The touch screen will suddenly not responding to ANY touch, only the the buttons are still working(include the 4 buttons on the bottom).
I had to hard reboot my phone to get it working again.
Does anyone face the same issue?
Sent from my XT910 using XDA App
Click to expand...
Click to collapse
Yes I also face this type of problem while playing games. Screen become unresponsive while playing but can solve by pressing power button(no need to reboot).Not on 2.3.5 base only on 2.3.6.
I also face this problem, after updating my rom to arctic 2.0 rom, which uses some stuff from 2.3.6.....power does not help, have to hard reboot. any idea why?
I've had this problem happen to me on my Droid RAZR (CDMA Verizon), can't remember if its before or after I was rooted... I just had to hard restart and its only happened once since then.
pswin09 said:
Yes I also face this type of problem while playing games. Screen become unresponsive while playing but can solve by pressing power button(no need to reboot).Not on 2.3.5 base only on 2.3.6.
Click to expand...
Click to collapse
The power button does not work for me
I had try to press the power button, but then the screen still not responding, so I cannot pass through the lock screen, and have to hard reboot......
I am on stock rom, 2.3.5, the Asian version.
But it seems it does not matter to different region's razr since the cdma one had the same issue
Sent from my XT910 using XDA App
I get this too. I had 3 razrs, first two had dead pixels so I had them replaced, all had this issue. Has not happened in awhile and I can't remember if it was always with a game, but at least one time it was with a game. Anyway, I don't think this has to do with rooting because my first one I never rooted and it did this. Don't remember if power button worked or not, but I had to reboot as well with power and volume down, or up, whatever it is, to get it to respond again.
No problems here.
I have had this happen about 4 or 5 times for me as well - got it day of launch. Mine says it is the XT912 though - is that right?
XT912 is the Verizon specific one, so yes.
Seems to be a fairly common issue. What is the chance that this is a software problem as opposed to a hardware one and so will be fixed with an update?
I had it happen for the first time yesterday after about 5 weeks or so, strange cause I wasn't doing anything. Battery was at about 15% though...
I only encounter this bug when I open Rom Toolbox for the first time and the superuser permissions screen shows up. My screen doesnt respond to touch anymore. I have to use the power button to make it work. Thats it. It happens nowhere else.
I've been using ROM Toolbox since day one, can't say it's the issue.
Sent from my XT910 using xda premium
opensourcefan said:
I've been using ROM Toolbox since day one, can't say it's the issue.
Sent from my XT910 using xda premium
Click to expand...
Click to collapse
Happened to me today...any need to panic?? On official Stock ROM 2.3.5...
Also, is this a hardware issue or software??
My problem is bit different, on a 4 month old unrooted razr.
Touch screen will start to fail recognizing my sywpe typing and start jumping all over the place, or it will end the word while I'm still sywping the word...
Sometimes it types in different letters (1/2 keyboard away) when I'm not sywping to avoid this BS when it happens.
Unfortunately, I cannot reproduce this result whenever I want to, I'm currently trying to reproduce the situation.
I believe this happens more often when my battery is low... or when I have been using it for an extensive time.
I go to draw program to test if it is the hardware problem and it is jumpy too, but not by much.
The problem does get better with reboot, but not 100% of the time, so I can't conclude it is SW problem
I also have issues with this. I think the problem is software side. It seems to be poorly responsive often after I unlock my phone and try to swipe screens.
Also while typing quickly with two hands it often does not input all the letters I type, although it flashes the keys and acknowledges that I touched them (this one might be a keyboard issues, not sure yet)
And ya, on an all black screen, I'm noticing some dead pixels- a lot of rectangular patches of dead pixels. I don't really notice it anytime else except when it's all black.
Been making me double think my choice, but I will wait for ICS update and possibly bootloader bypass. But.. I might be getting another phone shortly just because of the size (bezel mostly), these touch screen issues, and the performance isn't exactly where I anticipated it to be.
Razr XT910 touchscreen randomly jumping or not responding
I'm having all the problems mentioned earlier:
- touchscreen stops working randomly
- touch "jumps", like someone is touching it in random places
- some letters on the keybord stop working randomly
- phone gets quite hot at the top
My XT910 is not altered in any way, stock android 2.3.5, as updated as possible.
This happened when it was up-to-date and the very clean one.
This happens really irregularily. At first it happened when I played multitouch games - at some point the touchscreen just stopped responding and could only go back or lock the screen (but not unlock it, obviously).
Twice it happened when I was just going through messages or contacts.
I sent it to Motorola to fix it - they just reset it, benchmarked it for 45seconds and sent it back.
The very evening I got it back I tried to "heat" it myself - I installed a lot of apps, played a lot multitouch games on 3d graphic and voila! - it started freaking out like never before (vidoe in zip file attached).
My last idea is that it happens because of a low quality generic anti-scratch foil on the screen. So I threw it away and tried to "heat" the phone again - nothing.
I used a different foil - anti-reflecting + benchmarking apps - nothing.
If it happens again I'll send it with this video + the one I'll make then.
Hope it gets Motorola specialists off their ass and back to work .
Hey there, my maxx has this weird issue with it's screen too.
Take for example, a game with on screen controller like reckless racing. If i push the screen too long, it won't recognize my press anymore in the pressed area. I tried to go back home, thinking this is the game issue, but it's not, the home launcher button that coincidentally in the same location with game control button is unclickable. i tried with phone tester app and it show the same symptom, the pressed area indicator will disappear within 1-2 minutes.
The only solution is to turn off display and turn it on again. Should i bring it to service center?
Sent from my XT910 using xda app-developers app
Hello, I've recently having this exact same problems with my Motorola Droid Razr Maxx.
The screen sometimes doesn't respond as it should:
-Random touches.
-Not detecting swipes.
-Not detecting anything at all after long press.
-Detecting the touch location wrongly...
When this happens, sometimes a reboot fixes everything. Others, I just have to stop using the phone, and come back later.
Has anyone managed to find a possible cause and/or solution to this problem?
I've tried diferent roms, full reset, rsd flashes... But still the same problem

From sleep to lockscreen LCD blank problem,any solution?

Hello.
When I leave my phone in sleep mode (screen locked and light off) and try to wake with On/Off button, sometimes I get a black screen with a faintly image. The touchscreen works and all the buttons, and if you click 2 times On/Off button - the image appears all ok. I tried to flash another stock ROM - all the same. Then I`ve unlocked the bootloader, rooted the phone and even did the S-off with wire trick (1.53 Hboot). Then I`ve tried 3-4 custom ROMs with 6-7 different kernels, from stock to custom, but all the same. Yes, I`ve updated the firmware file, also, but with no difference.
Well, I see that this problem is not so usual, but I couldn`t find any real solution. Did anyone have this kind of problem and solved it? Since I got this phone from another country - official warranty is out of the question, I need a DIY solution.
Any help is greatly appreciated.
THX in advance!!!
I would have to say it looks like the light for your screen is dying, I had my screen replaced once, my screen would flicker from very dark to very bright
Sent from my HTC EVO 3D X515m using xda premium
flashallthetime said:
I would have to say it looks like the light for your screen is dying, I had my screen replaced once, my screen would flicker from very dark to very bright
Sent from my HTC EVO 3D X515m using xda premium
Click to expand...
Click to collapse
hmmmm, but when I get the OK image - it doesn`t flicker or go from dark to bright, it only has trouble to "wake up from sleep mode". even when i relock the screen quickly and don`t leave it unused for 2-3 minutes, the screen works OK every time....it looks like a software problem, but still I didn`t manage to fix it with all the ROMs/kernels/firmwares I`ve flashed....
E-ducation said:
Hello.
When I leave my phone in sleep mode (screen locked and light off) and try to wake with On/Off button, sometimes I get a black screen with a faintly image. The touchscreen works and all the buttons, and if you click 2 times On/Off button - the image appears all ok. I tried to flash another stock ROM - all the same. Then I`ve unlocked the bootloader, rooted the phone and even did the S-off with wire trick (1.53 Hboot). Then I`ve tried 3-4 custom ROMs with 6-7 different kernels, from stock to custom, but all the same. Yes, I`ve updated the firmware file, also, but with no difference.
Well, I see that this problem is not so usual, but I couldn`t find any real solution. Did anyone have this kind of problem and solved it? Since I got this phone from another country - official warranty is out of the question, I need a DIY solution.
Any help is greatly appreciated.
THX in advance!!!
Click to expand...
Click to collapse
Thinking about how to troubleshoot if hardware or software. When in sleep mode, instead of using the power button, I would have the phone plugged into a computer and use the " adb reboot " command to reboot the phone without touching the phone a few times and see if it lights up correctly. The first thing you should see is the boot screen, and if it works every time, then you do have an issue with your firmware. If you don't see that boot screen first every time, then as much as it sucks, I would guess there is a hardware issue.
Good luck, but this is the easiest way I know of to help determine what the issue likely is.
Minor update here, the first thing (at least on mine) that I see is the lock screen for just a quick second or two, then it quickly goes into the boot sequence. This is important as in "sleep" the ROM is running, so if the first thing you see is the boot sequence every time, and not the lock screen, then it points more to a software problem than a hardware issue. CM9 had an issue for the epic4g where you had to turn it off and on sometimes to get the keyboard to light. They found the issue in the firmware causing it.
Just wanted to make this as accurate as possible.
Wow so I am not the only person with this problem. The EVO 3D that I have was replacement phone that was given to me from Sprint from the first EVO 3D that I had which had issues with the digitizer. I received the replacement phone this past Tuesday and it worked fine for two days. It was not rooted and I did install the ICS update. On Friday morning I took it off the charger and went to work, while in the break room the screen suddenly went black and I could not get the phone to display anything after that. The Android function buttons at the bottom will light up but the screen wont, the phone also gets hot even with it powered off.
Long story short, I took it back to the Sprint store where they ordered me yet another replacement EVO 3D. Has anyone had to go through 3 EVO 3Ds or more?
sonza said:
Thinking about how to troubleshoot if hardware or software. When in sleep mode, instead of using the power button, I would have the phone plugged into a computer and use the " adb reboot " command to reboot the phone without touching the phone a few times and see if it lights up correctly. The first thing you should see is the boot screen, and if it works every time, then you do have an issue with your firmware. If you don't see that boot screen first every time, then as much as it sucks, I would guess there is a hardware issue.
Good luck, but this is the easiest way I know of to help determine what the issue likely is.
Minor update here, the first thing (at least on mine) that I see is the lock screen for just a quick second or two, then it quickly goes into the boot sequence. This is important as in "sleep" the ROM is running, so if the first thing you see is the boot sequence every time, and not the lock screen, then it points more to a software problem than a hardware issue. CM9 had an issue for the epic4g where you had to turn it off and on sometimes to get the keyboard to light. They found the issue in the firmware causing it.
Just wanted to make this as accurate as possible.
Click to expand...
Click to collapse
Excellent thinking, I didn't think in that direction. I'll try this tomorow, since I'm not at home. My personal oppinion that it's a software problem but if I did all the above - what did I miss? If I flashed the firmware, ROM and kernel, what else is left untouched that could affect the LCD? Could anyone suggest a good kernel? Or can I downgrade the firmware, since no one had such a problem with GB?
just to inform all - I tried all soft solutions, but all the samo. finaly - I replaced the LCD and everything is OK.
THX all for help

[Q] Touch response during charging

Yesterday I purchased this awesome phablet but I found few bugs.
I already updated to 14.1.B.1.510
1) screen of death -2 times.(volume down + power key help me to reboot)
2) Touch response during charging is very weird..
3) I never saw such a ugly camera.
So I Want To Know Should I Replace It OR its software fault
54 views but no response. Friend please let me know this is hardware fault or software fault.
When I put my mobile on charging screen touch becomes less responsive.
Anyone facing this problem
Please reply me it's very costly mobile...
And is there any permanent solution for SOD.( screen of death)
1. Try ticking the optimized backlight setting, or turn off adaptive brigthness, or factory reset, or repair via pcc. Or claim warranty.
2. No not for me, still sensitive enough I don't see noticable difference when charging. Try charging it in different place (other than your home or something) or try using another charger.
3. Yes, downright ugly.
Sent from my C6802 using xda app-developers app
2. I remember reading about a lot of Note owners having trouble with the touchscreen while charging. Not sure if it got fixed through an update, but it never got mentioned again (as far as I know), which has to be a good sign?
Sent from my GT-N7000 using XDA Premium 4 mobile app
and what about SOD(screen of death) , is it software fault or hardware ??
can i replace my phone or wait for solution(update)....
maniacscorpio said:
and what about SOD(screen of death) , is it software fault or hardware ??
can i replace my phone or wait for solution(update)....
Click to expand...
Click to collapse
From the first day it was reported no one truly knows whether it was software or hardware. Firmware update seems to make a lot of reports die down, but not all - making it likely to be software. The trigger seems random and varying it suggests it could be hardware for some.
Hell, no one knows. I never had sod in my old fw (461 and 475, but I used it only for a very short time) but on 510 (wiped clean) I do experience occasional "fake death" issue, but I only need to press the power button two times max to wake up the device. So well, maybe its not even sod.
LordManhattan said:
2. I remember reading about a lot of Note owners having trouble with the touchscreen while charging. Not sure if it got fixed through an update, but it never got mentioned again (as far as I know), which has to be a good sign?
Click to expand...
Click to collapse
My previous phone was huawei with amoled, and the sensitivity while charging was very bad. Turns out every device was like that. My zu isn't, clearly. Wonder if the OP's case is really that bad.
Sent from my C6802 using xda app-developers app
I currently use the Galaxy Note 1 running on Jellybeer (custom ROM) and will be going for the Ultra LTE (100% sure no backing out.. lol)
2. Weird touch behavior while charging is present on the Galaxy Note.. I am using my Original charger + Cable and I notice that it is not really sensitive whenever I use it while plugged in.. Worst is at the middle and gets better as you go out to the edge of the screen. (problem gets amplified if I get into skin contact with anything that has direct contact with the ground)
I suggest trying out a different cable or socket as it seems like your body and the charger gets grounded to earth somewhat.
Try using your Ultra while touching the wall or standing barefoot on cement and see if it gets worse..

possible screen problem with z ultra 6802 help!!!!

So recently my z ultra has been acting up there's a single black line that flickers across the screen at time and then the screen turns sort of white and whatever image is on the screen at the time of this happening stays there if you scroll to another home screen or open an app it eventually goes away if you turn the screen on and off multiple times but then it happens again sooner or later......i will upload pics or a video later to give you guys a better idea on what im talking about
aeazy617 said:
So recently my z ultra has been acting up there's a single black line that flickers across the screen at time and then the screen turns sort of white and whatever image is on the screen at the time of this happening stays there if you scroll to another home screen or open an app it eventually goes away if you turn the screen on and off multiple times but then it happens again sooner or later......i will upload pics or a video later to give you guys a better idea on what im talking about
Click to expand...
Click to collapse
Go to phone > *#*#7378423#*#* > Service test > Display
If the screen is not all white then you have LCD problem.
If all white that's mean your LCD is good,maybe try flash another ROM or factory reset.
Sent from my c680X using XDA premium
Sounds like you're having the same problem as me. You only have a single line though, while 2/3 of my display is like this. Mine gets like this whenever it's a little under room temperature, and it's a hardware defect according to Sony.
Post some pictures though. It could be software related (if you're lucky).
Sent from my C6833 using Tapatalk
My XZU has this 1x1 cms 'purple cloud' at top mid center of screen all the time. I see it at the phone boot animation also. Its not captured on screen. So I guess its an LCD burn mark
Its visible only at medium and high brightness on a black background. Not on white background.
aeazy617 said:
So recently my z ultra has been acting up there's a single black line that flickers across the screen at time and then the screen turns sort of white and whatever image is on the screen at the time of this happening stays there if you scroll to another home screen or open an app it eventually goes away if you turn the screen on and off multiple times but then it happens again sooner or later......i will upload pics or a video later to give you guys a better idea on what im talking about
Click to expand...
Click to collapse
http://youtu.be/iFnjwzcNcX4
I did a factory reset twice ...and its running the stock rom
Sent from my GT-N8013 using xda app-developers app
LordManhattan said:
Sounds like you're having the same problem as me. You only have a single line though, while 2/3 of my display is like this. Mine gets like this whenever it's a little under room temperature, and it's a hardware defect according to Sony.
Post some pictures though. It could be software related (if you're lucky).
Sent from my C6833 using Tapatalk
Click to expand...
Click to collapse
It does happen when the phone gets a little cold so maybe we have the same problem
Sent from my GT-N8013 using xda app-developers app
aeazy617 said:
It does happen when the phone gets a little cold so maybe we have the same problem
Sent from my GT-N8013 using xda app-developers app
Click to expand...
Click to collapse
Just checked out your video, and i'm having this issue too. That's called "ghosting", and that means that the response time of the screen has gone to hell. The issue gets triggered on mine when the temperature drops a little.
Try this:
- Is it functioning normally in room temperature? If yes, put the phone in your refrigerator for 2-3 minutes and see if it's still functioning properly. If not, well.. then you're having the same issue as me, and i've talked to Sony, and it's a hardware defect and you'll have to use your warrenty and get a new screen. I sent mine in for repairs today, so i'm crossing my fingers.
IF you decide to send it in for repairs, remember to call them and ask them to do whatever triggers the issue, or else they'll simply re-flash the firmware and call it a day. That's what happened to me the first time, and you don't want that to happen
LordManhattan said:
Just checked out your video, and i'm having this issue too. That's called "ghosting", and that means that the response time of the screen has gone to hell. The issue gets triggered on mine when the temperature drops a little.
Try this:
- Is it functioning normally in room temperature? If yes, put the phone in your refrigerator for 2-3 minutes and see if it's still functioning properly. If not, well.. then you're having the same issue as me, and i've talked to Sony, and it's a hardware defect and you'll have to use your warrenty and get a new screen. I sent mine in for repairs today, so i'm crossing my fingers.
IF you decide to send it in for repairs, remember to call them and ask them to do whatever triggers the issue, or else they'll simply re-flash the firmware and call it a day. That's what happened to me the first time, and you don't want that to happen
Click to expand...
Click to collapse
It was working fine then I put it in the fridge for two minutes and it started malfunctioning as soon as I took it out like you said it would
Sent from my GT-N8013 using xda app-developers app
aeazy617 said:
It was working fine then I put it in the fridge for two minutes and it started malfunctioning as soon as I took it out like you said it would
Sent from my GT-N8013 using xda app-developers app
Click to expand...
Click to collapse
Alright, so it's the same issues as i have, and it's a production error according to Sony, so you'll have to send it in for repair. This is strangly enough only the second case where this happens, that i've read or heard about (including my own Ultra), so it doesn't seem to be that big of an issue. It could simply be an issue on a batch of Ultras that we got. It's a really strange defect though.
Alright, so I got my Ultra back yesterday with a new screen, and the problem is solved. I tested it by leaving it in my refrigerator for about 5 minutes, and there were no signs of slowdowns or other defects, so that's the way to go
Sent from my C6833 using Tapatalk

Problem with touch screen or software bug?

I bought a Mate 20 Pro on preorder and noticed within a few days a seemingly non-responsive part of the screen that was an intermittent issue.
Basically every now and again (often enough it’s annoying but not every time) after I unlock the display I am unable to select any app icons in the lower half of the touchscreen. The top half is fine - the home buttons are fine but everywhere from the middle down is non responsive.
I assumed a hardware fault so amazon replaced it for me - and the new device is exactly the same!
Am I just super unlucky and have managed to get two faulty devices a month apart from Amazon or is something else causing the issue?
Thanks.
Think you've just been unlucky,nothing like that on mine
Fine here too. I assume you tested this as soon as you got the phone before installing any app / custom launcher?
Have you tried running smart diagnostic tests manual mode in hicare, there's a touchscreen display test.
Sent from my HUAWEI LYA-L09 using XDA Labs
I only noticed it in use after I used a custom launcher however I tried multiple launchers and saw the same behaviour.
I just did the HiCare test and it says normal. I did hard reset it the other day and it hasn’t happened since so I will see if anything else happens. I can’t say I am thrilled by the thought of another swap from amazon if it does happen. That’s super bad luck.
Hi how did it go after the hard reset?
I got the same issue myself but instead of being the lower half, my entire screen does not respond to touch. I've done a hard reset my self and i do run the stock launcher. Even though my screen still doesn't respond to touch now and then after unlocking the screen or receiving a phone call.
Touchscreen issue
Yup I get it annoyingly so as well! Often takes a "double tap". Pain in the ace!

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