Lenovo SYSTEM BOARDS
5B21D53637
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y5002NAU
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y5002PAU
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y50052AU
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y5CT01WW
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y5CTO1WW
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y5S03B00
ThinkPad X1 Extreme 4th Gen (20Y5,20Y6) Laptop - 20Y6S0AR00