Lenovo SYSTEM BOARDS
5B21C21558
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 Carbon 7th Gen - (20R1, 20R2) Laptop - 20R10022AU
ThinkPad X1 Carbon 7th Gen - (20R1, 20R2) Laptop - 20R10023AU
ThinkPad X1 Carbon 7th Gen - (20R1, 20R2) Laptop - 20R1A009AU
ThinkPad X1 Carbon 7th Gen - (20R1, 20R2) Laptop - 20R1CTO1WW
ThinkPad X1 Yoga 4th Gen (20SA, 20SB) Laptop - 20SA000YAU
ThinkPad X1 Yoga 4th Gen (20SA, 20SB) Laptop - 20SA0010AU
ThinkPad X1 Yoga 4th Gen (20SA, 20SB) Laptop - 20SACTO1WW