I've bought S4 yesterday.

Everything works great except recorded video or Youtube video starts to flicker/artifacts, green lines appears and eventually the video stops.

I've tried installing Nexus camera but that didn't work either.

Also when i play videos that are from my PC it works normally, no flicker or artifacts appears.

Tested for dead pixels but there is none:

Increased brightness to the max Installed a free app called Dead Pixel Test by UJACHA from Google Play Cycled through the colors and inspected the screen.

Here's the screenshots when playing youtube:

enter image description here enter image description here

Dummy recording is here

Should i return the cell and demand a new one?

  • So, you recorded the video on the PC using the S4's camera?
    – geffchang
    Sep 27, 2013 at 7:50
  • @geffchang I've recorded a dummy video using S4 camera, it's not watchable. The screenshots are also from S4 see the artifacts on bottom right corner. I'm returning it today. Sep 27, 2013 at 7:55
  • What if you record something else, like not something from a PC / laptop. Is it OK?
    – geffchang
    Sep 27, 2013 at 7:58
  • Mind to hop over to chat? chat.stackexchange.com/rooms/25/android
    – ce4
    Sep 27, 2013 at 8:00
  • @geffchang No matter what i record the problem is the same, as you can see i've tested to be sure. It's obviously from the bad batch of S4 series. Sep 27, 2013 at 8:03

1 Answer 1


I'm returning it today because the video is non-watchable, contains flicker and artifacts obviously it's from a bad batch (defective units out of the box, april 2013). At least I've tested it and saw artifacts when casting YouTube video to Google Chromecast.

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