Here are a few troubleshooting steps you can follow to get your modem or router working again:

1. Check to make sure your modem and router are properly connected.
2. Restart your modem and router.
3. Verify that your modem and router are both turned on.
4. Check the modem and router indicator lights to ensure everything is working properly.
5. Confirm that your broadband connection is working properly.
6. Check to make sure your computer is connected to the modem or router.