Note 9 Won't charge or power on after replacing charging assembly

Everything was working fine except usb-c had gunk in it, which prevented male usb-c making connection.

After replacing usb-c charging assembly I connected it to charger. The phone vibrated and the red blinking light appeared but the screen remained black. Which piece of hardware was damaged?

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@phonevulture "phone vibrated and the red blinking light appeared " sounds like a display issue. Double check your work and inspect the display connector. Make sure it is properly inserted, no bend pins etc.

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