[Q] Black and white display - Samsung Galaxy Core

Is there any mean to turn display black and white like for S5 supersaving?

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[Q] HTC Desire(Bravo) Display Problem.

My screen turns to random color from pinkish to red and purple to monochrome(black and white). It started when I highlighted a text into my message box and then suddenly it turns to pinkish red display. And then everyday the color changes randomly.Here is the display.

getting red dots on the screen

getting these big red spots on the screen , just randomly happened over 2 hours
red dots disappear when the screen is white but when it is black or dark they dots become visible
does anyone have the same problem ?
is there a fix ?
thanks
Pics?
Its the screen i think. Faulty pixels, they dissapear on white background. You should replace it.

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my screen is always on, showing black screen with white clock. how to disable?

my screen is always on, showing black screen with white clock. how to disable?
This is a feature of the amoled screen. All black pixels are actually off. Though if you don't want it, there is a way to disable it:
Settings>Advanced>Display>Ambient Display then switch it off

S8+ screen display Help?

my screen display suddenly show these type of color

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