***What You Can Try-***[br]
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Sometimes a dead battery can block power-up.
Disconnect battery completely.
Plug in charger with just the logic board and screen connected.
Wait a few minutes and try pressing the power button.
Observe any heat, buzzing, clicks, or even a warm spot on the board — this could point to a short.[br]
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***Inspect Key Components Again***
Use a magnifying glass or macro phone camera to inspect:
* USB-C port area (likely U7000 or similar chip for charging)
* Capacitors near the ***charging IC***
* Any signs of pitting or green corrosion around chips or between pads
If you find even a tiny corroded component, take a close-up photo and identify it.[br]
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If nothing goes well, try to find a micro-soldering technician.