1. kriz225's Avatar
    Hey all. I just got a Nokia Lumia 928 yesterday and today I noticed something strange. When the phone's screen is on but displaying black pixels (e.g. a black background, camera app when lens is covered) there are some odd looking streaks on the screen. The issue is not unlike what's being described here:

    Black spot on screen - Nokia Support Discussions

    Basically, it looks as if the majority of the screen was being lit by a very dim backlight while these irregularly shaped streaks and spots are truly completely dark. I realize that this phone has an AMOLED display and therefore has no backlight, so my only guess is that the majority of pixels have some sort of small current applied to them save for those in the really dark spots. When the screen is off or displaying color the spots are no longer visible.

    I am concerned as this is distracting and the phone is brand new. Have any of you ever seen this? Should I take the phone back for replacement?
    08-23-2013 11:19 PM
  2. kc77's Avatar
    Hey! I have a 928 and I notice it on my phone all the time. I think it has something to do with the way the screen works. To display black color as dark as amoled screens do, pixels will completely shut off when they are not being used. I think its something along those lines (I'm not the most tech savvy person out there.) Anyways, my guess is that it's just random pixels that don't shut off completely or just stay on when a screen is loading. It doesn't seem to effect the screen when it's on so I don't worry about it. Lol.
    08-23-2013 11:36 PM
  3. ooklah's Avatar
    This is normal for AMOLED screens. My 928, Q10, and Galaxy Nexus all have the artifacts on black screens.

    I wouldn't worry about it.

    Sent from my Nexus 7 using Tapatalk 4
    08-24-2013 12:55 AM
  4. psiu_glen's Avatar
    08-24-2013 05:56 AM
  5. mas90guru's Avatar
    I have dark streaks on my 928. They appear in the lower left corner and a few of them are about 1/3 or 1/4 the length of the screen. They do not however appear in any apps or otherwise cause issues with screen display. I figured it was something similar to what has been described above.
    08-24-2013 07:55 PM
  6. kriz225's Avatar
    Thank you for the sources and thank everyone for the corroboration. This is unfortunate for someone with slight OCD such as myself but not that big a deal as the circumstances under which the symptoms occur are rare during normal use.

    For the sake of completeness, the L1020 thread links the xda post below, which does a good job of explaining the situation:

    Mura Effect & AMOLED Displays (Note II) - xda-developers
    08-25-2013 01:29 AM
  7. kingenu's Avatar
    if you replace the glass on the screen do you still see this?
    02-24-2014 10:09 AM

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