10 Elder

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30.5K Posts

October 29th, 2023 11:10

If you're seeing it before the OS loads as it appears, it's a hardware issue -- the screen will need to be replaced.

1 Rookie

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4 Posts

October 30th, 2023 10:42

can I know what could have caused this defect?

10 Elder

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30.5K Posts

October 30th, 2023 10:55

Some screen types are still susceptible to image retention -- OLED for instance.  And if the system was subject to an abnormally high usage cycle (such as powered on for hours or days at a time without a screen saver or the screen off), that can also contribute.

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