IBM-Lenovo IdeaPad Z400, Z400 Touch, Z500, Z500 Touch 71CN51WW - VIWZ1 - (V1.21 _ 4 MB _ 2 MB bios
IBM-Lenovo IdeaPad Z400, Z500, P400, P500 (Touch) LA-9061P, LA-9063P _ 71cn51ww_EC 128 KB_Main 4 MB bios