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Imagine if you got off work, made dinner, ate, and cleaned up. You sit down and relax hoping to catch up on Netflix exclusive TV show and you get the “No Cast Devices Found” error. You just watched it the day prior. You try to power cycle the Chromecast and reboot your phone just in case. Same. Here are some things you can try according to Google’s Device Discovery troubleshooter:
-Make sure TV is on and source input is set to HDMI connected to Chromecast
-Reboot Chromecast using the Chromecast app or by unplugging the USB power cable
-Make sure you are on the same WiFi network. Your source cannot be on different WiFi networks including 2.4GHz and 5GHz.
-Check to make sure your device triggering the cast is in sync. If not sync the clock.
-Check other devices if it can see the Chromecast
-Reboot your router
-Ensure AP isolation is disabled on your router’s settings
-Last resort, perform a factory reset on your Chromecast
If it still doesn’t work, contact Google support
https://support.google.com/chromecast/answer/6025971
