S4 Display Smearing / Ghost Problem

**Alextodd1** · 02-12-2014, 06:46 AM

I am experiencing Display / Screen smearing/ghosting issue in my S4. When I scroll in menu I encounter black background. Besides that, sometimes i also encounter a purple haze on the grey bits of the menu and elsewhere. The effect is more noticeable when the brightness is turned down. Any solution for this? I have tried another Original display but I am encountering similar problem. I have already re-soldered display connector pins and checked each pin personally via Multi-meter, as well as other surrounding components. Any help is highly appreciated.

**Sanjay Chandra** · 02-12-2014, 10:00 AM

Originally Posted by Alextodd1

I am experiencing Display / Screen smearing/ghosting issue in my S4. When I scroll in menu I encounter black background. Besides that, sometimes i also encounter a purple haze on the grey bits of the menu and elsewhere. The effect is more noticeable when the brightness is turned down. Any solution for this? I have tried another Original display but I am encountering similar problem. I have already re-soldered display connector pins and checked each pin personally via Multi-meter, as well as other surrounding components. Any help is highly appreciated.

Why don't you just take it to Samsung's service center ? It will be in warranty anyway.

Did you try running the screen tests with the help of *#0*# code ?

**Alextodd1** · 02-16-2014, 07:48 AM

Well, I need this thing to be quickly done, and they would atleast take a week to get this job done.
Well I didn't tried the code, i''ll go with screen test code then. didn't knew that there was one. Thanks for the help!

**mysticmeg** · 02-16-2014, 11:56 AM

What your experiencing when the brightness is turned down completely is normal. Let me guess when you turn the brightness up slightly it goes away?

**Alextodd1** · 02-20-2014, 07:25 AM

Originally Posted by mysticmeg

What your experiencing when the brightness is turned down completely is normal. Let me guess when you turn the brightness up slightly it goes away?

Yes that's the issue! So what it is all about?

**Sanjay Chandra** · 02-20-2014, 10:31 PM

Originally Posted by Alextodd1

Yes that's the issue! So what it is all about?

That's because in AMOLED displays , black color means they completely turn off in that region.

For example , if you put a plain black background , you will see that entire screen appears as if its turned off completely.That's because AMOLEDs have special ability to display "100%" blacks which you don't find it in any LCD.

When you scroll black background with white fonts or fast moving white objects , each of the "pixel sets" must go back and forth between 0 and 255 values because black and white have values of 0 and 255 for Red,Green and Blue.

This results in more ghosting effect in extreme low brightness and less problem at higher brightness but it still exists.

On LCDs , blacks are unnatural , blacks appear as "greyish black shade" , so contrast ratio is quite less and that's why they generally don't seem to exhibit this effect.

**Alextodd1** · 02-23-2014, 05:04 AM

That's a one useful piece of information Sanjay! Thanks Sanjay. Anyways can you tell me is there anyway I can resolve that on my own without going to any service center?

**Sanjay Chandra** · 02-23-2014, 01:29 PM

Originally Posted by Alextodd1

That's a one useful piece of information Sanjay! Thanks Sanjay. Anyways can you tell me is there anyway I can resolve that on my own without going to any service center?

There is no solution to it.

Its just the way it is

**mysticmeg** · 02-25-2014, 12:56 PM

Originally Posted by Alextodd1

That's a one useful piece of information Sanjay! Thanks Sanjay. Anyways can you tell me is there anyway I can resolve that on my own without going to any service center?

Yeah thats just the way it is. Amoled screens are beautiful got to admit!