LCD tv Hisense model 50K23DG. No picture, No sound, No backlight. Voltage all look good. When I press power, the red light flashes 6 times. I am suspect its an LED failure.

Hello Kenpappas, for what you describe, it would seem like a backlighting problem
questions if you can have a bad led ?, if many times a Led, is the one that proboca the failure
The correct solution from my point of view is, replace, all the Leds
As it is not practical to replace each led in the strips
It is more practical and simple, replace the full strips of leds
I send you a video, in which they show, the procedure of replacing the LED strips on a Hisense TV
I hope you can solve the problem
Greetings Franco Dosil

Hola Kenpappas, por lo que describes pareceria problema de retroiluminacion
preguntas si puedes tener un led mal?, si muchas veces un Led, es el que proboca la falla
La solucion correcta desde mi punto de vista es, reemplazar, todos los Leds
Como no es practico reemplazar cada led en las tiras
resulta mas practico y sencillo, reemplazar las tiras completas de leds
Te envio un video, en el cual muestran, el procedimiento de reemplazo de las tiras de Leds en un televisor Hisense
Espero que puedas resolver el problema
Saludos Franco Dosil