Unfortunately, the issues you are experiencing are symptomatic of an internal hardware defect, often a faulty power supply or main/control board, though there are many possible failure points. This issue could be a manufacturing defect, but is also often caused by a power event (shock/surge, prolonged over/under voltage condition, etc).
This could also be the result of age related wear and tear; these vizio tvs are at the bottom end of the quality spectrum and seeing short term failures like this is common. Luckily, you are still within the warranty period in this case.
There is one step you can take here, both as a possible fix, as well as a diagnostic evaluation:
1) Unplug the power cord from the outlet
2) Wait at least 1 hour (60+ Minutes)
3) Press and hold the power button (on the set, not the remote) for 60 seconds
4) Keep holding power button while plugging back in, and for another 60 seconds after. When plugging back in, go directly to the wall outlet, bypassing any power strips or surge protectors.
If this reset process does not work, it would unfortunately confirm an internal hardware failure.
This is something that would require repairs to correct; The next step would then be to call vizio warranty support at(###) ###-####to file a warranty repair claim. They will authorize repairs and you will take the tv in to the nearest service center to have it fixed. You don't want to attempt anything further than the reset process on your own, as that would only cost you additional time and money and void what warranty coverage you do have.
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