The matrix highlighting turned out to be damaged.
Matrix illuminated with LEDs the same as, for example, in the camera flash in a mobile phone. I did not think that these diodes can burn.
For me it is strange that the LED is damaged.
I wonder if it's not a marketing gimmick sometimes.
Incorrect current and voltage for the diode, which makes its lifetime short.
The video from your link shows that you can insert a plain white LED with a resistor from 100 to 330 ohm. In my case, I put a smd Led from a flashlight with a 100 ohm smd resistor. Checked with 24v power supply.
However, after connecting and assembling the TV does not work.
I try to start the TV 3 times and then the LED diode flashes red 6 times.
When you try to turn on when you turn on the backlight, you can see the replaced non-original LED as it shines with a stronger light than the original ones.
My guess is the wrong resistor.
I ordered a backlight from a new TV with a broken matrix.
As I mention, I will write about the effects.
