FOR BM5866 5B20V13662 5B21B64228 Motherboard — 300e 2nd Gen (CPU N4000 N4100 N4200)

Replacement notebook motherboard compatible with BM5866, carrying part numbers 5B20V13662 and 5B21B64228. Designed for 300e 2nd Gen systems and supports CPU models N4000, N4100 and N4200. Use this mainboard as a direct swap for repairs or refurbishments—verify your original part number matches before purchasing.