iPhone 5s screen blank
Hi! I'm looking for some technical advice regarding an iPhone 5S.
My device currently has a completely black screen, although it occasionally produces vibration sounds, suggesting that it might still be responding.
Here's its repair history:
- The original LCD was cracked but still displayed an image.
- The phone eventually developed a bootloop issue.
- I've tried replacing the LCD multiple times with different replacement screens, but none of them displayed anything.
- The battery has also been replaced.
- The device currently shows no visible Apple logo or display activity.
I'm wondering whether this could be related to the LCD connector, backlight circuit, display circuitry, or a motherboard-level issue.
I'd really appreciate any technical insight. I don't want to keep replacing screens without understanding the actual cause.
Thank you!
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