Temporary blotch on tablet screen after airplane flight - General Questions and Answers

Hi
I have 10" tablet that I bought from an Alibaba supplier which I am currently evaluating.
Over Christmas I took it to my inlaws which involved a plane flight.
When we got to their house I noticed a blotch in the middle to top half of the screen, but functioning of the tablet was normal.
After a bit of time on google I came to the conclusion that there is supposed to be an airgap between the LCD and digitiser and that blotch could be caused by the two coming into contact.
Then I found that by pressing the screen the blotch would move around.
Then I found that if I twisted the entire chassis of the tablet that it started to shrink.
Eventually the blotch disappeared.
I thought that maybe the tablet had taken a knock and something was distorted inside and pressing on the LCD or something like that.
On the way back I packed it a lot more carefully, but the same thing happened again.
I think that what happens is that during the flight the pressure drop causes some of the air between the digitiser and the LCD to escape out of the gap. Then as the plane drops the air for whatever reason doesn't re-enter the gap and so a slight vacuum forms in there.
I think that twisting the tablet most open up a seal somewhere and this allows a little bit of air back in.
Has this happened to anyone else?
Does it mean that the tablet is rubbish and I should find another supplier?
Or maybe it's just because it's an evaluation unit?
or should I not worry about it?
thanks, DNJ

Related

cracked screen

So yesterday I went out to dinner, grabbed my trusty TP2 and put it in my pocket (uncracked), reached out location and pulled it out (cracked). I know there was no impact between the two locations as I simply sat in a car the whole way.
Anyone else have something similar? Glad I have insurance, that's for sure.
Is it possible you had the screen facing out in your pocket? What I mean by that is when I keep mine in my pocket I make sure the screen is against my leg and not facing forward.. Either way, good thing indeed that you have insurance..
it is, but its a coat pocket. I Just couldn't believe it happened as I've had a touch screen phone for the last...3 or 4 years without issue.
if you have made fun of someone that has a case on there hip that is why it happend to you if not then its bad luck.
do you really believe that crack could appear after no physical impact?
I've seen crazier things happen. My one thought was that its quite cold here right now. Either way, I definitely didn't have any impact that I felt, which shouldn't be enough to crack a screen like this did. I just expect more out of HTC I guess.
A screen protector like invisible shield would help i have it on mine...only thing i hear is that when used in ur pocket it can pick up a lot of lint but so far mine hasn't had that problem. any little bit of dust i see on it i just rub it off
I've got ghost armor, when they get back in stock and i claim my insurance i'm going to start using a slip in case.
football0552 said:
So yesterday I went out to dinner, grabbed my trusty TP2 and put it in my pocket (uncracked), reached out location and pulled it out (cracked). I know there was no impact between the two locations as I simply sat in a car the whole way.
Anyone else have something similar? Glad I have insurance, that's for sure.
Click to expand...
Click to collapse
Yep. A couple of days ago I got into a car, the TP2 in my pocket (which was hanging...unzipped jacket) closed the door and crack! Lovely cracks spread across the screen of my beloved and not even 30-day-old TP2.
I should have known better, The same thing happened to one of my Moguls earlier this year. The weird thing is, the TP2 still works perfectly. I tried to get a return authorization, but Sprint referred me Assurion, which means $100 deductible. The only good thing about it is that the TP2 is so new, they don't have any refurbs to send out, so I'm getting a new one, with one year warranty. From now on, cases only... no pockets!
Not sure what happened in your case,
A: My assurion deductable was $39... I could have sworn it was $89.
B: I need to find a good stiff slide in vertical case that I can just slide the phone into and out of in my pocket.
C: Assurion says they'll get my phone to me Tuesday (i.e. out Monday).... either they're full of cow chips or they purchased a stock just in case since Verizon is apparently trickling in shipments.
what was the temperature outside ?
if it was decently cold, and your phone was cold as well, cold things always crack easier, especially with a screen this big. smaller the screen, harder it is to break.
haha, well it was cold for this time of year. nothing terrible. about 20 degrees F. I know the size matters, I just couldn't believe it cracked so easily so I was really just fishing to see if its a possible problem. My replacement will be here today and i've been trying to find a good STIFF slide in vertical case I can just keep in my pocket.
I live in Canada and on occasion it gets down to -25 degress c here (-13F)
and I have left many cellphones out in the cold, with no ill effects (although screen response can slow down dramatically while it's cold)
the only thing that would crack it is a dramatic change in temp. over a short period of time, like 80 to -5 and I don't even know about that.
a screen skin is NOT going to prevent cracking, only scratches, the LCD glass is on the inside of the device and a think film doesn't add anything to stability.
my guess is it got flexed are banged in the wrong spot. possibly a few days earlier which weakened it and then lightly banged again when you put it in your pocket...
of course a defect in the internal glass is possible, when you get in to mass production of a product there are bound to be some defects.
mine on the other hand has traveled 10 feet across from say 4 feet up and hit pavement with no more than a 1mmx3mm indent on a corner.
it's in general a well build device (but boy was I sick when that first happened)
My advice, if your insurance costs money.. bring it in with a little story.
"I was sitting at a table and typing away I closed the keyboard, and I couldn't believe it a crack appeared across the screen"
As long as it is a solid crack across the screen with no obvious point of impact, I am pretty sure you will get away with it.. even with out insurance.
Football, Telus here in Canada has a thin hard plastic case for 15 canadian.
it will even prevent your screen from getting scratched. and makes that annoyingly placed "power"/screen blank button harder to push. I am pretty sure all the cdma devices are the same, but I don't know 100% I ordered a verison screen protector, and it fits. but the tolerances aren't as high for that
I had the same thing happen to me just a week ago. Slid it into my pocket and not even three minutes later, pulled it out to use the phone and had fresh cracks spreading across the screen. The phone did not come into contact with anything... Still a mystery to me as to how it happened!!
BTW... If you were looking at the phone in the upright position, the screen cracking started from the left middle of the screen and made it's way across to the bottom right corner. Just wondering if anyone else has had the same pattern.
twasnow said:
I live in Canada and on occasion it gets down to -25 degress c here (-13F)
and I have left many cellphones out in the cold, with no ill effects (although screen response can slow down dramatically while it's cold)
the only thing that would crack it is a dramatic change in temp. over a short period of time, like 80 to -5 and I don't even know about that.
a screen skin is NOT going to prevent cracking, only scratches, the LCD glass is on the inside of the device and a think film doesn't add anything to stability.
my guess is it got flexed are banged in the wrong spot. possibly a few days earlier which weakened it and then lightly banged again when you put it in your pocket...
of course a defect in the internal glass is possible, when you get in to mass production of a product there are bound to be some defects.
mine on the other hand has traveled 10 feet across from say 4 feet up and hit pavement with no more than a 1mmx3mm indent on a corner.
it's in general a well build device (but boy was I sick when that first happened)
My advice, if your insurance costs money.. bring it in with a little story.
"I was sitting at a table and typing away I closed the keyboard, and I couldn't believe it a crack appeared across the screen"
As long as it is a solid crack across the screen with no obvious point of impact, I am pretty sure you will get away with it.. even with out insurance.
Click to expand...
Click to collapse
To keep it short, I know, I know, I know, and I know. lol. (Just for an interesting note, being in South Dakota for College I've had it around that cold without a windchill... walking to class and having your eyelashes freeze in a block sucks.)
I was more or less just trying to come up with the most plausible excuse even though I was sure (99.999%) it wasn't the cold. It just completely blew me away that I pulled it out and there was cracks across the screen because at the point I hadn't even dropped the phone and as previously mentioned I wasn't leaning or really touching anything while riding in the car.
Also, generally its not actually glass that's on resistive touchscreen's as far as I know. I wasn't trying to insinuate that the screen skin would help stability at all (actually stiffness... don't get my started about this I've been dealing with stiffness matrices WAY to much lately in class).
I agree in general it seems quite well built, and agree if my case is isolated but I was wanting to make sure it was. A point of note is that the crack originated on the far right side and propogated in a couple of lines across the screen. Really my guess is that the method they use to connect the "glass" (a plastic..?) produces some residual stresses around the edges of the material.
Finally, where do you get the case you have? I really just want a slip case as I mentioned that is pretty stiff so that anything that may possible break the screen gets spread out over the area of the case. I am trying to stay away from a snap on hard case as I find them bulky, get your device dirty, and really don't protect what I want to protect.
Thanks for your input.
wbchristmas said:
I had the same thing happen to me just a week ago. Slid it into my pocket and not even three minutes later, pulled it out to use the phone and had fresh cracks spreading across the screen. The phone did not come into contact with anything... Still a mystery to me as to how it happened!!
BTW... If you were looking at the phone in the upright position, the screen cracking started from the left middle of the screen and made it's way across to the bottom right corner. Just wondering if anyone else has had the same pattern.
Click to expand...
Click to collapse
mine cracked middle right and propagated in a crack more or less horizontally across the device and another at about a 45 degree angle towards the bottom of the screen. The instances sound similar just reversed.
The reason your screen cracked was most likely it pressed up against the seatbelt buckle. I have had this happen a couple of times. When driving now I ALWAYS take my phone out of my pocket or remove the case from my belt. As I said, a couple times I left it there and when I buckled up, the buckle of the seatbelt was pressed against my right hip. A little bit of pressure, like from stopping the car, is enough to crack the glass.
So word to the wise, do NOT leave your phone in your pocket or on your belt when you get into a car. Or if you do, put it on the side of your body that is facing away from the seat belt buckle.
docgiggs said:
The reason your screen cracked was most likely it pressed up against the seatbelt buckle. I have had this happen a couple of times. When driving now I ALWAYS take my phone out of my pocket or remove the case from my belt. As I said, a couple times I left it there and when I buckled up, the buckle of the seatbelt was pressed against my right hip. A little bit of pressure, like from stopping the car, is enough to crack the glass.
So word to the wise, do NOT leave your phone in your pocket or on your belt when you get into a car. Or if you do, put it on the side of your body that is facing away from the seat belt buckle.
Click to expand...
Click to collapse
Haha, I already do this. Actually, I was in the passenger seat and the phone was in the right pocket of my fleece jacket. I'm just the jacked it what damned me because normally when I put it in my pants I have the screen facing my leg.
Is this something that asurion will cover?

I fixed the rainbow rectangle digitizer issue with duct tape!

Long time lurker here... I got the dreaded "rainbow" rectangle on my screen that meant that the digitizer stopped working. I was pretty sad to say the least. I called Verizon and they wanted $95 to send me a new one with the silly insurance plan. I scouted google and saw that many other have had this issue.
So, I broke down and bought the replacement digitizer on eBay. Well tonight, as I looked at my broken phone, I thought that since I was going to be eventually replacing the digitizer, it couldn't hurt to try to mess with it a little. I noticed that the rectangle appears as a thin film between the top and bottom layers of the digitizer. This thin film is what causes the rainbow effect, just like a thin film of oil on top of water.
What got me thinking was that I had just set the screen to beep when tapped, and every time I turned it on it tapped once. This meant that the screen was actually being pressed continually. So, I thought that I'd try to pull the screen away from the bottom a little. I finally got some duct tape (of the clear variety), and carefully laid it over the entire screen. Then, I pulled off at a pretty shallow angle so it would pull on the top layer pretty good.
Well, lo and behold, the screen started working again! And there isn't a hint of rainbow/oilness at all. And it is totally responsive, as before.
So, if you are in the same boat, try some duct tape or similar.
Cheers!
acmegeek
That's pretty good news I suppose, at least one possible DIY solution has been discovered. Kinda puts my mind at ease thinking that one day my phone might not be responsive to touch. I'll have to keep this in mind if that day ever comes. It does make sense though.
Be careful doing this. It fixed my spot, but now the LCD only displays 2 white lines.

[Q] HTC Sensation Digitiser Replacement Failed?

Hey, I have broken my digitiser (The phone obviously didn't like me, and tried to commit suicide or run away from my pocket, and felt on the asphalt) and replaced it with a new one, i had the tools and some experience so it was not difficult, but after replacing it, i noticed that when u "wake up" the phone u need to rub the screen for about 4 seconds, only then the screen starts to "respond" to your finger. Then i went outside with the phone - (i live in Northern Norway so it's -10 celcius ATM) and got this splat, as if an air or condensation, i tried to blow it off with the FAN ,and left it near the radiator for a whole night. But the Splash did not get smaller, if i remove the battery cover, and the battery itself, and if i twist, try to bend the phone, the "splat" Moves and gets smaller, if i try to press hard on the screen, the splat gets bigger. Do you think it's my mistake that i did something wrong in the process of replacement, or is it just the layer of glue, that's not dried up yet.
I'll attach the picture of the phone (sorry for the quality, taken from a GF's Wildfire,)
The unresponsive screen is a really common thing with a new digitizer. There is a thread somewhere in "general" thats deals with that issue. But for the splat, it seems that the cold seperated the layers of the replacement digitizer wich i guess is a cheap copy of the stock one and couldnt handle the cold.

[Q] N5 Random Shut Downs After Screen Replacement

So I ended up cracking my screen and installed a replacement last night. Everything seemed fine but I noticed, after putting it back together, that any slight bit of pressure or shock to the top causes my N5 to shut off.
I took it apart again to make sure all of the ribbons were properly connected and to take a second look and everything appears fine. I didn't have this problem prior to the replacement and I was very gentle during the tear down and reassembly so I don't the the CPU or anything on it is damaged. Other than the top being hyper sensitive the phone works perfectly.
Any ideas on what the problem is or could be?
SOLVED(sorry, I don't know how to change the title)
I just wanted to fill in anyone curious or running into this problem in the future on how I resolved the issue.
So after some time I narrowed the problem down to the second back cover (the one with the camera lens and beneath the Nexus branded cover) making contact with the motherboard. More specifically, compressing the power management IC with its aluminum cover. You want to make sure that chip is laid flush which was a PITA, for me at least, because the headphone jack and earpiece speaker wants to push it up and out. What I did was put the jack in, lay the board on top, then gradually adjusted the jack with tweezers while gently pushing the motherboard down until the board was flush, then placing the earpiece speaker in.
I then placed the second back cover on and tightened the screws until I could feel them just slightly putting pressure on the cover. I can't stress how light this pressure is as it is the key in resolving this issue. To compare it to changing your oil filter on your car; when you can feel the filter make solid contact with the block and you then turn it about another half turn to seal it; it's like that but without that half turn.
Anyway, I hope this helps anyone else unfortunate enough to both break their screen and then have their phone randomly shut down when any pressure is applied after fixing it.
hello
TCGUK said:
So I ended up cracking my screen and installed a replacement last night. Everything seemed fine but I noticed, after putting it back together, that any slight bit of pressure or shock to the top causes my N5 to shut off.
I took it apart again to make sure all of the ribbons were properly connected and to take a second look and everything appears fine. I didn't have this problem prior to the replacement and I was very gentle during the tear down and reassembly so I don't the the CPU or anything on it is damaged. Other than the top being hyper sensitive the phone works perfectly.
Any ideas on what the problem is or could be?
Click to expand...
Click to collapse
hello where didu buy the screen for your new n5 ? there is any king of intrusion to do it .
thank:good:
josedecuba said:
hello where didu buy the screen for your new n5 ? there is any king of intrusion to do it .
thank:good:
Click to expand...
Click to collapse
I bought mine off of eBay and it cost me $150. I could be wrong but it looked like the screen can't be separated from the frame. You might want to keep that in mind when purchasing because there are sellers that sell the screen without a frame. Tearing down the N5 was pretty simple. The hardest part for me was getting the back cover off as there are 4 (two on each side) large clips. If you end up bending the clips any, you can push them back to shape to keep the back from creaking like every Samsung I've ever owned. There's a nice guide on iFixit if you want to look at the process prior to ordering a new part.
I've read from others that you can send your phone into LG and they'll repair the screen for you. When you send it in they'll email a quote to you within a day. The price I keep seeing is $146 and I have no idea what the turn around on that is.

[Q] Erratic touch screen behavior when docked

My TF700 has recently developed erratic touch and screen behavior when docked.
Symptoms: Jumping screen - the image at times bounces around slightly
Phantom touches happen when touching the sceen OR the BACK of the tablet, and less frequently, when not touching the screen, but when holding the tablet where the screen angle may be moving slightly back and forth.
Sometimes, as well, the tablet does not respond to the keyboard. Changing the angle will sometimes remedy that.
It appears that this only happens when docked and may have to do with movement of the angle of the tablet in the dock. The problem seems to go away if I move the tablet/dock angle more vertical AND support it in the back to keep it from moving back and forth.
My unit is too old to be in warranty. At one point one of the plastic clips on the connector broke and I used epoxy to fix it. I also noticed that at one point, pushing the tablet back to too oblique an angle would actually cause the case of the dock to separate slightly.
It might be possible that some of the "phantom" touches that have been reported when a tablet is sitting untouched are due to vibrations in the room (walking etc) causing the tablet to move the docking angle sufficiently, resulting in the issues here.
Any ideas on how to steady the dock/tablet connection?
sounds more like your touch screen is failing, your fault desciption sounds just like mine did before I changed the touch screen and the issue has now gone away
Sent from my K00C using XDA Premium HD app
Update- Found a "fix" for now
EDIT: I ended up using self-stick velcro, just the fuzzy side. I put a 2 inch strip behind each hinge. The fit is quite tight, but that is what I was aiming for. Tablet is behaving OK.
I tried using my son's keyboard dock and the problem did no occur. It had considerably less play in it as well. I have temporarily concocted a fix -- I put a strip of material (a thin velcro tie wrap, because it was handy) along the inside back of the dock hinge before inserting the tablet. This tightened the connection sufficiently to keep the strange behavior from happening. Gotta come up with something a little more permanent, though. I'm thinking of trying label tape (like TZe Label Tape) until the thickness is right.

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