Lenovo SYSTEM BOARDS
5B21B63877
is compatible in the following Models:
Lenovo 100 Series (IdeaPad)
100e Chromebook 2nd Gen MTK (Lenovo) - 81QB0007AU
100e Chromebook 2nd Gen MTK (Lenovo) - 81QB000MUS
Lenovo Chromebooks Series
100e Chromebook 2nd Gen MTK (Lenovo) - 81QB0000US