Sorry to hear you 'won the lottery'. Your astute application of logical process of elimination pinpoints the fault exactly. This is a textbook example of troubleshooting 101. Kudos to you for exercising all the options. Most complainers do not accumulate enough valid data points to make a foolproof determination. Without another mibox, or another known-to-work tv, the only logical deduction is 'it's not working, and no clear indication of a specific 'it' that is causing the problem. There is no smoking gun to be found without changing at least one element of the system. As an aside, 2 hypothetical questions.... What if your friend's MiBox, that worked without complication on your friend's tv, still gave you an error with Netflix when tried with your TV? and.. What if you took your suspect MiBox and connected to your friend's tv and it worked without a glitch? Would you accept there was a problem involving your TV? I have personally played this testing scenario with hundreds of sundry tvs. My results have only shown 2 MiBoxes as having suspect HDMI hardware when connected to compliant TVs. Further, only a single MiBox was DOA. What's even more tantalizing is Walmart donated 3 identical 4K tvs to a local senior citizen community where I volunteer. Of these 3, it is a crapshoot when they will work properly or not with Netflix, even with the same MiBox on every occasion. HINT: Don't ever buy a Heier brand TV!!!!! Walmart told us they were glad we took them off their hands and, no, they had no interest in our returning them as they had written them off as a charitable deduction.