Lenovo SYSTEM BOARDS
5B21B37830
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 Fold Gen 1 (20RK, 20RL) Laptop - 20RK000HAU
ThinkPad X1 Fold Gen 1 (20RK, 20RL) Laptop - 20RK0034AU
ThinkPad X1 Fold Gen 1 (20RK, 20RL) Laptop - 20RKCTO1WW
ThinkPad X1 Fold Gen 1 (20RK, 20RL) Laptop - 20RL000GGE
ThinkPad X1 Fold Gen 1 (20RK, 20RL) Laptop - 20RLS09400