This worked perfect for me. I did not wait 1/2 hour though. Just on plugged all from small box with error (coax, power and hdmi to tv), went upstairs pulled out the power on the big box for 30 and plugged back in. Once that TV was back working after the start-up routine, I replugged all on small box that had the error and all good! THANK YOU for posting this fix!
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