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Black semi circle on screen edge

Discussion in 'Android Help' started by eduuu, Jan 21, 2016.

  1. eduuu

    eduuu Lurker
    Thread Starter

    Hello, I've got a Moto X Force and it has a small semi circle in the right edge of the screen, see the pics:
    http://pho.to/9ziul
    Not sure if it's a software or hardware problem.
    Any ideas?
     

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  2. Mikestony

    Mikestony ~30% Carbon Black ±
    Moderator

    Hello!
    Welcome to AF:)
    Not familiar with that device, but does another window, or menu popout when you click on it?
    Are you on the stock launcher?
     
  3. eduuu

    eduuu Lurker
    Thread Starter

    Nothing happens when I touch it.
    Yes, it's the stock launcher. Android 6.0
    I've saw on internet the same problem in a Samsung S6
     
  4. Mikestony

    Mikestony ~30% Carbon Black ±
    Moderator

    So it's there no matter what screen you are on, or what app you open?
     
    Hadron likes this.
  5. androidmachine

    androidmachine Android Enthusiast

    Have you tried to swipe it? It just looks like a tab of some kind.
     
    Mikestony likes this.
  6. mikedt

    mikedt 你好

    Try taking a screenshot with the phone itself, and if it's not present there, then it's almost certainly a problem with the screen, and would need replacing.
     
    Brian706, SavageRobot, Hadron and 2 others like this.
  7. Mikestony

    Mikestony ~30% Carbon Black ±
    Moderator

    Oh, good thinking there @mikedt !
     
    scary alien and mikedt like this.
  8. scary alien

    scary alien not really so scary
    Moderator

    Yes, great idea, indeed!

    Also, what happens when you change orientation of the phone (with an app/screen that obeys orientation changes, of course)?

    Does the "blob" follow the orientation change?
     
    Brian706, SavageRobot, mikedt and 2 others like this.
  9. eduuu

    eduuu Lurker
    Thread Starter

    It is there from the beginning, when you turn on the phone and the white android screen shows it already has the semicircle.
    It remains in the same position even if you change orientation.
    I'll try the screen capture thing it's a good idea.
    I think it's too perfect circle shape to be dead pixels, perhaps it's a kind of sticker or protection they failed to remove when the phone was assembled.
     
    scary alien likes this.
  10. Doug1029

    Doug1029 Lurker

    Same problem, Galaxy s7 Edge purchased from Republic Wireless a couple of years ago. My wife is not sure, but doesn't think her phone had this from the get-go.

    So if this problem shows up (except on screen capture images) on both Moto X and Samsung Galaxy, what does that mean? A common problem in Android? Something in common in the display hardware that shares this failure mode? A virus?
     
  11. lunatic59

    lunatic59 Moderati ergo sum
    Moderator

    If it doesn't show up on a screen capture then there's nothing there for the OS to capture. It's strictly a hardware/screen problem, although it seems od to have the exact same problem on two different phones 2-1/2 years apart.
     
    Doug1029 likes this.
  12. Doug1029

    Doug1029 Lurker

    Exactly. Very odd. I'd love to see the root cause of this one, especially because it's a semicircle.
     
  13. lunatic59

    lunatic59 Moderati ergo sum
    Moderator

    You didn't say if it there in a screen shot. If it's not, then its probably screen damage. Not sure why it would be a semi-circle at the edge if the display unless there's a bubble under the LCD.
     
  14. Doug1029

    Doug1029 Lurker

    The black semicircle is not there in the screen shot, so yes, we have to look at the hardware. A bubble? I like that idea. Say more. An air bubble embedded in the display? Possibly. Why exactly a semicircle, though? I wonder whether a pinpoint water leak at the edge could propagate into the display matrix in a circular pattern.
     
  15. lunatic59

    lunatic59 Moderati ergo sum
    Moderator

    That's where I was going with that, or a sharp impact that ruptured the LCD at one point and it bled radially from the edge.
     
  16. Doug1029

    Doug1029 Lurker

    Well, except that the S7 Edge's screen is super amoLED, not LCD (see https://www.gsmarena.com/samsung_galaxy_s7-7821.php) so I'm dubious about bleeding per se. I examined the area of the phone closely and saw no sign of such an impact. BUT your idea of a bubble or propagating defect remains the most plausible one.
     
  17. lunatic59

    lunatic59 Moderati ergo sum
    Moderator

    Cigarette burn? Storm Trooper Blaster impact? (Oh, wait, they never hit anything ;) )
     
    The_Chief, Doug1029 and mikedt like this.
  18. mikedt

    mikedt 你好

    Maybe some contamination or a bit of moisture got into the screen. As I understand it the organic materials that AMOLEDs are made from can be damaged in this way. The screen will definitely need replacing, no other fix other than living with it and hoping it doesn't spread.
     
    #18 mikedt, May 22, 2018
    Last edited: May 22, 2018
  19. Doug1029

    Doug1029 Lurker

    It's not a moon ( )
     
    lunatic59 likes this.
  20. Doug1029

    Doug1029 Lurker

    Or if it gets no worse, we can live with it, I suppose, until the next phone upgrade...
     
  21. paulbike

    paulbike Lurker

    identical problem with LGV40. Been through LG & Verizon tech support; been to repair stores, etc. It's a perfect half black circle at the right border that doesn't show up on screen shot; doesn't move when touched; stays in the same location when I change screen orientation; color doesn't change when theme changes. The only thing that makes sense to me is that there is a sticker physically inside the phone that is not supposed to be there.
     
  22. Hadron

    Hadron Smoke me a kipper...
    VIP Member

    It's definitely hardware. I'd be amazed if someone managed to leave a sticker between the screen and the glass, as typically screen, digitizer and protective glass are all bonded together, but if they had then it would be visible with the screen off if you shone a light on it.

    Perfect semicircle is a weird hardware fault, but this definitely isn't software. Did any of those repair stores actually try replacing the screen?
     
    MoodyBlues likes this.
  23. The_Chief

    The_Chief Accept no imitations!
    VIP Member

    Yep, if nothing happens when the spot is swiped in from the edge, or tapped, then there is no reason for it to be there. It's either a hardware error or (conspiracy hat on) some indicator of malware or secret app running. Time to contact the manufacturer/carrier and see if they have any insight.
     
  24. King Siesta

    King Siesta Lurker

    My phone has this exact same problem. Middle of the screen right-hand side, black semicircle that does nothing. If I remember correctly this had a function to begin with (I may be wrong). But I believe it was connected to games. In game you could swipe this semicircle and open a small program. However I distinctly remember turning this off at some point. And I believe that's when the circle appeared. Now it won't do anything. Totally unresponsive. I hope this can help someone give us anyone answer, cause this thing really annoys me. Thanks you.
     
  25. King Siesta

    King Siesta Lurker

    also my phone is a samsung S7 edge.
     
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