Screen Burn In (retention)
Which one should i replace for the problem to fix?
does the problem will coming back if i change the component?
Is this a good question?
To get rid of the screen-burn marks you will have to replace the entire display assembly, we have a guide on how to do that here (follow all the way to Step 7), if you want to do this yourself.
However the problem will not be solved forever, as this type of problem occurs really often with AMOLED or OLED displays because static elements are displayed for too long in the same location without the screen refreshing them. You can only slow this down by changing your wallpaper often, hiding the on screen home keys and changing the location of icons every now and then. Keeping the backlight not maxxed out and setting a short screen time-out for the phone will also help.
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