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Cellular version of Apple's 2nd generation iPad Air. Model A1567.

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What are the reasons for the appearance of a black shadow on the side

What are the reasons for the appearance of a black shadow on the side of the iPad screen?

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How much of the screen? Add a picture of what you're looking at into your post so we can get a better idea of what you see exactly.

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hello there,

The screen backlight is provided by two independent diode circuits. If one of the circuits (for various reasons) stops lighting, you see a shadow due to insufficient light. You need to open the iPad, check the backlight circuits, repair the damage and close the screen tightly. The fault is rather from the easy and quick category. However, it cannot be done without microelectronics. Alternatively, if the fault is on the matrix side (where the illuminating diodes are located), it is enough to replace the matrix itself. However, such damage is extremely rare.

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This was also my first thought. I might want to know some history of the device since this often occurs as a result of a different repair, but I think the fix would probably be the same regardless, just easier to confirm.

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kareem sarà eternamente grato.
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