Database Users

Oil-like stain reflection on screen

After owning the Touch HD for a full month I just noticed that down the middle of the screen there is something which I can best describe as an oil stain. It looks as if there is a liquid in between the glass/plastic screen and the resistive layer that lays on top of it.
The screen works normally and this "stain" can only be observed if I look at how the light reflects of it.
Any idea what happened?

Hi,
I have a small idear. The TFT-Monitor ist touching your Touchscreen. Probeply you pressed something on your HD, that the two Monitor touch each other, that is why it looks like a Water or Oil spot.
This can happen for example, if you are carrying your HD in your trouser pocket.
If you want to try to remove this spot, you have to turn with your both hand the hd, like the right hand turn with the clock and the left hand turn to the other way.
Sorry, my english is not very good for such a discribing. What I mean is like "to contort" or "to skew (up)". But you have to be very carefully. Before you start, remove the Battery

(I'll be incorporating a clearer explanation along the lines of what Dude10 was trying to say)
The effect you're seeing is IDENTICAL to what causes the colours to appear on an oil film actually!
The way the Touch HD screen works is to have the hard glass (polycarbonate plastic actually as far as I'm aware, but that's not important here!) with a squashy resistive sensor layer on the top.
This resistive layer detects touch as an increase in resistance at the spot that's compressed - be that by a finger or a stylus. Because the upper layer can be compressed, it can also be malformed by stronger than normal pressure, such as an object in a pocket. The effect can be more pronounced if your body heat warms up the screen surface making the screen "set" in position rather than spring back as it should do...
The "oil" effect is cause by the reflections of light from the outermost plastic layer and the outermost surface of the hard screen. When the gap is small enough, these reflections can interfere with each other, cancelling and re-inforcing different wavelengths depending on the thickness - hence the tapering of the screen from thinnest to thickest results in a "rainbow"
Now, why explain all this you may ask? Partly because I like science and it fascinated me in school to learn what caused that effect so wanted to share this! (And this also explains why it only presents itself when you look at the light reflections)
Anyway, more importantly, the solution to your problem is to restore the thickness of that part of the touch layer to it's original uncompressed state.
I'd firstly start trying to hold your finger flat against the top of the phone screen (on flat surface, portraint orientation, finger "left to right") then pressing resonably hard (the hard screen should protect the device - if not you're pressing too hard!) slide your finger down the screen from top to bottom trying to keep an even pressure. This should hopefully even out the surface.
Failing this, as Dude10 suggests, take the battery out and use your thumbs (holding with fingers in the battery well) to press and "smear" around the problem area.
Unfortunately, other than this I don't think there's a particular way to remove the effect totally if it doesn't work...
Obviously it's speculation given that you didn't mention how it happened in the first place, but it does sound like it got knocked or pressed by something either in bag or pocket - maybe even a fold in the pouch
Hope you manage to smooth it out!

WhO_KnOwS said:
After owning the Touch HD for a full month I just noticed that down the middle of the screen there is something which I can best describe as an oil stain.
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Click to collapse
Just a long shot, but:
Sometimes a similar effect can be caused when some moisture has got between the layers of a display.
Have you used the phone anywhere damp or very humid ?
Keeping it somewhere warm and dry might be worth a try?
- Steve

Thanks for all the tips. The issue happened when I had the Touch HD in the pouch and in my pocket - so the idea that it was a fold in the pouch holds water.
The funny thing however is that before I saw all of your replies I was already out the door (with the Touch HD back in the pouch and pocket). 5 minutes later when I pulled it out the issue was gone. I am guessing that I reapplied the exact amount of pressure needed or something like that.
Thanks again for the tips and especially to chaosdefinesorder for the nice explanation.

Thx for helping explanation

5 minutes later when I pulled it out the issue was gone.
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no, i don't think it was gone. check again under a fluorescent light....
i have this on my diamond. my HD is flawless (till now...)
i phoned to a technician and explain the phenomena and he invited me to replace the screen. when i got there, to my complete amazement and embarrassment the stain was gone. only later i discovered that the stain is visible under fluorescent light only.

chaosdefinesorder said:
Unfortunately, other than this I don't think there's a particular way to remove the effect totally if it doesn't work...
Hope you manage to smooth it out!
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thanks m8, already tried this (on my diamond) and tried now again with both yr methods. no results. the stain is still there...i think only a replacement can solve it.
here u have the paralel thread in diamond forum:
http://forum.xda-developers.com/showthread.php?t=439410&highlight=oily+stain

you can not do it yourself. the best way will be to go to your seller or straight to HTC, because I think you HD still have warranty.
I repaired ones an Diamond and I can tell you, it wasn´t an easy way.

Edges of screen unresponsive (Unless touching bezel!)

This is my first phone with a capacitive screen, so perhaps it is a quirk of them, but I have noticed that if I am not holding the phone in such a way that I am touching the metal bezel, the screen does not recognise touches that are close to the edges of the screen. It seems that the screen requires a circuit to be made with other metal parts on the phone before recognising the touch.
For example, if I put the phone on my desk and touch the backspace key with a single finger, nothing happens. If I keep holding my finger on it, and touch the metal bezel, hey presto, the button clicks.
This reminds me of a watch a friend of mine had a long time ago, that had a capacitive "hair trigger" button that only worked for him (because it required a circuit to be made with the back face of the watch, meaning when he pressed the button it completed a circuit through his body)
Anyone else noticed this? It is slightly annoying because I have to hold the bezel when I want to use the phone..

Confirmed.
And you might very well be correct in the assumption about the circuit not closing in every part of the screen. I think it's the nature of any capacitive surface tbh. If you press in the middle of the screen then there is enough adjecent space to actually complete the circuit while on the edges there is simply not enough space around your fingertip to not close the circuit at all. That is why touching the bezel works.
But as I have been holding my little Hero in my hand while typing anything I simply didn't know this little odd thing. I have read about it though.
Yet another reason to hold your precious little Hero in your hand...

Wierd not like that on my samsung.. its all plastic tho

Mine is the same.. especially on the right hand side of the screen. If it's in a case it makes it really bad!!

Sounds like bad shileding and grounding to me

Didn't notice this until I put a screen protector on but now it's really bugging me.

On a related note (metal bezel related), I've noticed that in dim lighting the button backlight flickers. But if i touch the screen and bezel, it stops.

herman3101 said:
Didn't notice this until I put a screen protector on but now it's really bugging me.
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Same here. Could it be that the screen protector slightly touches the aluminium casing and thus grounding the screen (or creating a wrong potential)?
I noticed that when i touch (=ground) the outer aluminum frame with just one single finger then the touch screen works flawlessly.
(I'm using the offical HTC screen protector).

joemax said:
On a related note (metal bezel related), I've noticed that in dim lighting the button backlight flickers. But if i touch the screen and bezel, it stops.
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Hmm definatly bad grounding issue. Its either some pretty poor design or a defect.

i confrim, using hero without touch the metal edge result in less responsivity and difficult on multitouch operation
hope new firmware can solve this, too many errors using it like a normal keyboard on a table!

Few questions about X2

As a fresh owner I have a few questions:
1 - The lower right corner of the front panel wobbles (?), moves slightly on touch, I can press it for about 1mm (see the attached screen). It is especially annoying when pressing OK or dial off (or whatever the button is called). Is it normal?
2 - The screen has a slight green tone (hue), can anything be done with it?
3 - LCD has noticeable light leaking near the bottom side, again, is it normal? (Well, the screen does not work now anyway, gotta flash the phone.)
Thanks

Biges said:
As a fresh owner I have a few questions (too lazy to search):
1 - The upper right corner of the front panel is flimsy (?), moves slightly on touch. It is normal?
2 - The screen has a slight green tone (hue), can anything be done with it?
3 - LCD has noticable ligh leaking near the bottom side, again, is it normal? (Well, the screen does not work now anyway, gotta flash the phone.)
Thanks
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(1) I have no issues with this, seams fine on mine
(2) I cannot notice any hue, maybe you have a faulty unit given the blue colour and the movement of the panel.
(3) Yes LCD light is noticible, I also get leaks through the optical pad when I have the notification LED's on

1. I got some small loose on the front pannel upper area, it's especially felt when You hold the phone in one hand and work with Your thumb pressing the screen or just put the phone to You ear. You feel then the pannel moves a bit down. Maybe thats normal or just the build quality is not so good at all.

sounds like you have a faulty one. mine is solid as a rock. the loose screen and the green hue could be related. there shouldnt be any discolouration at all and i can only see it getting worse to be honest. where did you get it? if its somewhere reputable then id take it back and ask for a decent one while its still in warranty.
i do have tiny bit of light leakage near the buttons, that does seem common.

Mine is well made too, no hardware problems.

I have a silver one, solid as a rock, light leaks are present though...

Front screen only GLUED on? It is popping off!

Okay, I read that someone lifted part off the front by removing a screen saver! Now with me, I recognized that on the left side bottom, left to where the slideview and call buttons are under, the ENTIRE part seems to come up.
It is lifting itself and I bet in a few days/weeks this will get off.
So my question is if anybody had this happen and knows what is under there? Is there a possibility to GLUE it back on?
Now since I am watching this, I think the ENTIRE front can come off eventually and if it is just glued on at the bottom where one has to press the buttons all the time, it is only a matter of (short!) time until this gets out of hand.
Anybody found anything about taking this phone apart yet?

That happens to my phone, I do not bring it back because I buy it in a duty free shop here it japan and also that is the only issues on my phone and only some bugs. I just press it always there to bring it down but it keeps popping up. I think i can glue it, so I do it to fix the problem. Just be carefull if you do it, I notice that under the plastic screen there are buttons (as I think it is) the hard part that you feel when pressing the slideview or call. When you use a liquid glue and put to much, it can go to that button and worst may stuck that part or go inside the phone and also the part where the mic is. I put glue just on the sides just make sure to put small amount at a time. I cannot give the brand of the glue that I use because its in japanese.Now only the small part in the call buttons is up a little because I cannot put enough glue on that part, but in the slide view button its now okay and working well.
This is my firts post on xda hope it helps a little.

I broke a part replacing the screen

I just replaced my cracked LG V20 screen and fame and while moving parts over I ripped a very small part that I don't know how to find! It was at the very top of the frame and looked like a very small and sticky cable of some sort. I think it said "4v" on it and it wrapped from the back of the frame, around the top, and to the front. It ends up right above the speaker. Since I broke this part my phone doesn't wake up to my fingerprint without me first pushing the lock button and lighting the screen up. I have been trying to look for a parts breakdown and can't find it anywhere and nowhere that sells v20 parts has been of help either. Thanks for any help!

Try to see if the censors in the top are working(light sensor and proximity censor)

XsaucerX said:
Try to see if the censors in the top are working(light sensor and proximity censor)
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Working great

the gray bit that says a model like f800l or vzw and then further on a digit and a letter? Cant find anything else looking at my screen frame that fits your description even a little. If so it just seems to come on the whole screen+frame assembly.

Phoenix591 said:
the gray bit that says a model like f800l or vzw and then further on a digit and a letter? Cant find anything else looking at my screen frame that fits your description even a little. If so it just seems to come on the whole screen+frame assembly.
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It was up at the very tip top of the frame by the speaker. I just barely put my phone back together again (literally and now checking the forum) and the fingerprint sensor seems to be working again like normal. So it could have just been a loose connection that I tightened back up or something unrelated to what I was talking about.

Phelpsy93 said:
It was up at the very tip top of the frame by the speaker. I just barely put my phone back together again (literally and now checking the forum) and the fingerprint sensor seems to be working again like normal. So it could have just been a loose connection that I tightened back up or something unrelated to what I was talking about.
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Yeah probabily, I know the connector for the fingerprint sensor is a bit touchy, took a couple times opening and adjusting things for a good connection (it totally disappeared from lineageos settings when it wasnt connected right. I hope you didnt forget to transfer over the tiny rubber piece for the proximity sensor (right next to the front facing camera), I missed that first go around and when on a call the screen was forced off until the other party hung up)