Schematic, boardview, BIOS https://www.vinafix.vn/threads/apple-k35-j30-820-3115-b-051-9058-apple-a1278.3987/
Guide here https://vinafix.vn/resources/how-to-remove-password-bios-apple-add-edit-serial-number.1209/ BIO edit here A1278_13.3_2010_C1MNNJXJDTY3.BIN