Put the sender and Google TV on the same non-guest Wi-Fi, confirm Google Cast is enabled, update both devices, and restart them. Router client isolation or a VPN can block discovery even when both devices have internet access.
What this covers
- Google Cast from compatible phone, tablet or Chrome browser to Google TV
What it does not cover
- ×AirPlay-only apps or content that blocks external playback
Try in this order
0 of 4 completedUse the same local Wi-Fi
ReversibleConnect sender and TV to the same network name. Avoid guest Wi-Fi, VPNs and access-point isolation during the test.
Confirm casting is enabled
ReversibleCheck Google TV app/system settings for the Google Cast receiver and make sure it is enabled.
Update both endpoints
ReversibleUpdate the sender app, phone or browser and Google TV system software before changing router settings.
Restart sender, TV and router
ReversibleRestart the phone or computer and Google TV. Restart the router only if local discovery remains unavailable to every sender.
Evidence ledger
Sources behind this answer
Exact questions
Common questions about “Google Cast cannot find or connect to Google TV”
Why can't Cast find the TV?+
The phone and TV may be on different networks or have local network blocked.
Could guest Wi-Fi be the cause?+
Yes, guest networks often isolate devices.
Does the phone need location or local network permission?+
On some phones, apps need permission to find devices on the local network. Check that the casting app has local network access.
Could a VPN block casting?+
Yes. A VPN on the phone can hide it from the local network. Turn it off and try again.
What if the TV shows in some apps but not others?+
Restart the app, update it and check it is signed in. If only one app fails, the problem is with that app.
Does the app need updating?+
Casting support depends on the app, so update the app and the Google TV software.
Could the phone and TV be on different bands?+
Some routers separate 2.4 GHz and 5 GHz networks in a way that hides devices from each other. If the phone and TV are on different bands with device isolation, casting can fail. Put them on the same network.