The laptop antenna has become disconnected.
The router should have a way of showing yu the signal level.
In the same room expect levels better than -40 d.
If the antenna is bad, the level will drop to near -80 db.
Otherwise a good machine can be two rooms away and still hit -75 db.
These are only approximations based on personal experience.
Here is a link that might help:
https://www.netspotapp.com/best-apps-to-measure-wifi-signal-strength-windows.html Before you write an angry email to your Internet service provider, purchase a new router, or return your brand-new smartphone because of mediocre WiFi signal strength, you should first measure WiFi signal strength using a WiFi signal strength meter app.
Don't buy anything! Try the free apps.