Ethernet wont connect pls help

1- does the card show up in Device Manager/Network adapters?
2- is the modem set up for DHCP LAN? what's the IP of the modem?
3- is the card getting an IP - check from command line with ipconfig command
4- do you have the correct ethernet cable connected between your computer and modem?
5- are you sure you're connected to LAN port on your modem and Not WAN?