My tablet connects to my Wi-Fi but no internet. All other devices fine?

This is a bit weird… Suddenly my Lenovo tablet can't connect to the internet despite connecting to the router. If I go into settings it says it's "connected but no internet". The router and service are working fine, in fact my phone and laptop have no problem. I've tried rebooting it but no joy. Any ideas?

1 Delete the 'remembered' connection information from the tablet
2 Reboot the tablet
3 Reconnect the tablet to the Wi-Fi

You may need to reboot the ROUTER… Not all things are totally related to your laptop. Routers contain tables of devices. If those get confused the computer in the router may not work properly. Just unplug the router, wait 20 - 30 seconds, reconnect power wait for the router to reboot. (Routers contain computers.those sometimes need rebooting don't they?)
Yes the issue COULD be with your lenovo BUT since it connects to the router with no problem it makes me suspect the router could be at fault. Yes one unit can be blocked by the router and others work just fine!

FORGET the Wi-Fi connection on the lenovo, then REJOIN it so you have to retype the PassKey value in.

You may need to factory reset it if it will not connect anymore, the networking files could be damaged.