Sudden unsupported signal with Chromecast

While watching a show from Netflix, streaming from my nexus 4, 4.4.4 to our TV, a 42RV530U, the tv casting screen suddenly just has my TVs message "unsupported video signal". If I unplug Chromecast from the HDMI port on the back of the TV, it changes to "no signal", so it appears my TV recognizes there is a device there, but out of nowhere, doesn't recognize it?? We've been using this system for months!
I tried switching it to a different HDMI port and changing the input, which works properly with our other devices like Xbox, so I know it's not a problem with the port. I tried the Xbox on all ports/inputs and they're all fine, and just once I was able to get the Chromecast home screen back and stream Netflix long enough for one episode via a different HDMI port, but then it did the same "unsupported signal" thing, and now no matter what port/input I'm on, it won't register. The Netflix app still says it's playing and connected to Chromecast however, so I feel it's something to do with the TV and not Chromecast.
I did troubleshoot all the steps, finally ending with holding the button on Chromecast until it reset. Attempted to set it up again, but I cannot see the code on the screen. Just the same TV message, "unsupported signal".
Why would it support it just fine, and then suddenly stop, and now the TV doesn't recognize it at all??

I found the problem. Somehow, something happened to the kernel image and corrupted it. On a whim I re-installed the package, getting 4.0.1-1 again and after that the system boots fine again.
No idea what happened to it, there were no crash events or bad dismounts etc. that I know of. I guess Windows might have done something.
Thanks!

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Read Circle Encoder.gif ‏22 KB

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