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Hi and Thank you for using JustAnswer, please allow me a few moments to check over all the details you have provided my assistant pearl!
I'm really sorry to hear you are having trouble with TV, let's take a look into this together and hopefully we get that resolved today.
It's a very common problem you will face when the led light flashes red, what the tv is saying to us by that is, a problem has been detected and requires a service or repair. I wouldn't be able to give you an indication of what exactly could be faulty internally but it will take a professional to examine to give you a precise indication of what it may be and how much it would cost if you decided you wanted to have a repair rather than purchasing a new one.
Some of the things to consider here are;
Thank you for using JustAnswer and I look forward to assisting you in the near future!
Settings you won't be able to get to without having any visual on the screen, if you put the below into action, there's a chance you may have a working television again!