Tv turns on and off and is very dim

Tv turns on and off and is very dim

I have a 65” Vizio D65-E0. Just the other day it began to turn itself off and on when connected to my fire stick as well as when I open the apps installed to the tv. Also the screen is very dim (part of the bar up top that shows the channel and WiFi signal is barely visible). I’ve contacted Vizio and they gave me basic reset instructions before basically telling me my tv was useless now. In need of a second opinion before I throw it out.

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