: Check the charging port area; these slim Swift models often suffer from physical DC jack fatigue.

This board is commonly found in entry-level to mid-range laptops manufactured around 2016-2019. If you have a laptop with a black PCB, Intel Celeron or Core i3/i5 (7th gen), and a distinct power sequencing layout, you are likely holding an NB8511 variant.

The NB8511 is a widespread board, so the file is available on most repair forums. Look for the following filenames exactly:

: A 72-page detailed circuit diagram for the "Floris Yebisu" (NB8511/NB8512) MB V4 is available through specialized repair portals like Boardview Files