Casting appears to be broken on my Shield TV. It doesn't show up in the Google Cast app, or any others.
Im flashing back to January... Maybe El Goog's screwing with stuff before I/O?
I wish it still supported miracast... I used to use that as a fall back. Looks like I'll be plugging my trusty ol Lemonade Chromecast into the TV.
I had a similar issue yesterday. I rebooted my Shield and it started working again.