Hi @otakunoweeb
Check the status of the WLAN adapter in Device Manager - Network Adapters - click on the > symbol to expand the list - right click on the Intel WLAN entry - Properties - General tab - Device status box. Does it say "This device is working properly"?
To get to Device manager in Win 10, press the Win key + x key (both together) and click on the Device manager link.
If there is no WLAN entry in Device Manager, check in BIOS to make sure that the WLAN has been enabled.
If there is a WLAN entry in Device Manager is there a red cross or yellow exclamation mark next to the entry?
if there is a red cross, right click on WLAN entry - Enable and check if it works. Sometimes youy may have to restart the laptop after this for it to work.
if there is a yellow exclamation mark, right click onthe WLAN entry - update drivers. You need to be online (Ethernet?) to do this or you can download the [https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x220/downloads/driver-list/component?name=Networking%3A%20Wireless%20LAN|Wireless LAN drivers] using another PC etc and then install them and then check.
If still no good then it may be a faulty WLAN card.
Use the manual I linked to your other question (a response on that would be appreciated if you got it working) to see how to change the WIFi card in the laptop