YouTube error · Occasional
YouTube cast icon shows no receivers — fix the device-discovery layer
You tap the cast icon expecting to see your Chromecast / smart TV / Google Home device in the list, but it's empty. Different from "cast fails" — the receivers aren't even appearing as targets.
Why this happens
- Different Wi-Fi networks (phone and target device on separate SSIDs or VLANs).
- 2.4 GHz vs 5 GHz band split — phones may not see devices on the other band.
- mDNS / multicast traffic blocked by router firewall.
- Cast receiver firmware needs an update.
- VPN on the phone routing past the local network.
How to fix it
- 1
Confirm same Wi-Fi
Phone and target device must be on the exact same network. Even subtly different SSIDs (Home_5G vs Home_2.4G) count as separate networks for Cast discovery.
- 2
Disable VPN temporarily
Phone VPNs frequently break Cast — the phone's LAN visibility is bypassed by the VPN. Disconnect, retry, reconnect after casting.
- 3
Open Google Home app to verify devices
google.com/home shows all your Cast-capable devices in your network. If they don't appear there either, the device-discovery layer is broken (router config, not YouTube).
- 4
Restart router + Cast receiver
Power-cycle both. Refreshes mDNS announcements and clears any stuck network state.
- 5
Check router multicast settings
Some "guest network" modes block intra-LAN multicast traffic. Confirm you're on the main network, not a guest network with isolation enabled.