Lenovo SYSTEM BOARDS 5B20W86503 is compatible in the following Models:

Lenovo ThinkPad Tablet Series

ThinkPad X1 Tablet 3rd Gen (Type 20KJ 20KK) - 20KJCTO1WW

ThinkPad X1 Tablet 3rd Gen (Type 20KJ 20KK) - 20KKS16UOO