Lenovo laptop won't connect with Wi-Fi? How to fix it?

Please be more specific.
Check if your laptop has a Wi-Fi adaptor,
List the specs of your Laptop to get better answer

Wrong password?

If the laptop can't see the router, reinstall network card drivers. Make sure the router is set to act as a DHCP server and the network settings on the laptop is also set to DHCP.

Make sure you are typing the correct password. If your password is connect but you are having the problem with connection. Then you need to go ahead, uninstall and reinstall the wireless adapter. Finally your device will start working fine.