Re: Sharp LC-70LE757U Flashing 2-5 :-( can it be saved economically?

To bring this thread back to life. I have the Sharp LC-70LE732U. I have the 2-5 blink. TV set does not come on at all. I've tried the force restart and have replaced the TCon board. I have removed the bezel and have found the side boards but to not want to remove the ribbons since it will be Final and irreversible.
I am not proficient in testing all the power sources, this is why I purchased a TCon board right away.
The large panel board is $300 to replace. I do not want to spend that kind of money...