Lenovo SYSTEM BOARDS
5B21L75646
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X13 Gen 4 (21J3, 21J4) Laptop - 21J3S00Q00
ThinkPad X13 Gen 4 (21J3, 21J4) Laptop - 21J4S10Q03