If your Internet connection is working on some devices but not on others, here are some suggestions to help you troubleshoot the issue:

1. Check if the Internet is working on all devices
2. Verify the network connection settings of all devices
3. Connect the device directly to the router and check the connection
4. Check the network activity on the router for any issues
5. Reset the router
6. Unplug the router and modem from the wall power source and wait for a few minutes
7. Check if the device is running the latest firmware
8. Check for any obstructions near the router that could be obstructing the signal