this post was submitted on 03 Mar 2024
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I have a Hisense and had a similar experience. I was watching something fullscreen on an HDMI input, and then it suddenly switched inputs and showed a fullscreen firmware update prompt. I had no choice available other than to agree to update the firmware, no cancel button, couldn't change inputs, nothing, the only choice was to update the firmware. So I unplugged the TV.
About 10 seconds after I powered it back on, the exact same update prompt happened, still with no choice to decline it. I pulled power and booted it back up one more time just to be sure, met with the update prompt again.
This made me very angry.
The next time I powered it on, I had a packet capture running to see where it was phoning home. I created a firewall rule blocking all the hostnames it tried to connect to at startup, pulled the plug, and then booted it back up. No more update prompt, and it hasn't happened again. Good thing they don't download and pre-stage the new firmware, I guess.
Let me know if you want the hostnames and I'll PM them to you.
At this point I just refuse to ever connect smart TVs to wifi, it's not worth it