My iPhone is displaying a white screen with dark corners and lines down the middle. What is up?

My iPhone is displaying a white screen with dark corners and lines down the middle. What is up?

Possibly a soldering joint failed or the ribbon connector is loose… Or bad battery… If it isn't the battery or software related then its a big fix, sorry to say… Not for the faint of heart when it comes to soldering pencils and small electronic components…

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