Display flashing before power on!!! Help please.... - General Questions and Answers

Galaxy J7 Prime (SM-G610F/DS)
When power on full display light up with withe color for lass then half second then coming up samsung logo then power on. Why display flashing before power on? I don't see any other problem display color is right no over hit. Just full display flashing for some micro second before appear samsung logo.
Already done device initialization by smart swtch pc and flash by odin. But not fix!

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