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Greenline reappearance after screen replacement

So, I have a Samsung Galaxy S21 5g with a lot of green-pink-white lines for months. now I was wondering if they reappeared after a screen replacement

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@testzico are you asking if they reappeared or are you telling us that they did? Did you replace your Display?

I was thinking of replacing it, so asked if it is a fact that it might reappear.

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Has the phone been dropped or gotten wet at all?

Just to verify that no water has entered the phone, check if the LDI has changed colour.

If it hasn't changed colour and if the phone hasn't been dropped then most likely, replacing the display assembly will resolve the problem.

If the LDI has changed colour or if the phone has been dropped then it may not be the screen but a problem on the systemboard.

If you decide to replace the screen, here's the ifixit Samsung Galaxy S21 5G repair guides that will help.

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Samsung Galaxy S21 5G