Hisense 50K23DGW

[iblackford]

HI All, I have a hisense 50K23DGW that flashes the red status LED 11 times on startup. No other sign of activity.

While the LED is off or flashing (trying to start, or after it tried to startup) I get the following voltages on the PS:
12V = 12V
SW = 2.8V
STB = 3.8V
16V = 19V

While the LED is red, in Standby, I get the following voltages:
12V = 12V
SW = 0V
STB = 0V
16V = 21V

I have also tried removing the LED string from the PS, no change in behaviour. I have included some pictures of the various boards in the TV, if they are helpful at all.

Any assistance would be appreciated. I am willing to dive deep on this repair, if needed, but I'd like some guidance...are there similar models with schematics I can refer to?

Thanks in advance, Ivan

[R_J]

Re: Hisense 50K23DGW

The fact that you can remove the led string from board and get the same result would indicate the led string in the panel is open. likely one or more open led's in the panel. You can try checking the voltage ACROSS the le connector, I suspect the voltage to be higher than 200v when the tv is turne on, this voltage will likely drop below 200v after a few seconds due to OV protection.

[budm]

Re: Hisense 50K23DGW

1) Please attach good clear pictures of the v=backside of the TV showing all the boards so we can see how they are connected together.
2) What Voltage do you get on the LED connector pins (connector in place) with ref to GND when TV is off and when TV is turned on, notes: you need to leave the test probes in place while doing this test.

[Unspun01]

Re: Hisense 50K23DGW

Sounds like failed backlight LEDs. Although I cannot recall if there was a blinking LED error code on the ones I fixed.

Your 50K23DGW is very much the same as the non-smart version 50K20DG. LED light strings are very easy to replace on this TV when compared to Samsung or LG. Each LED strip is vertical and completely separable from the adjacent strip. They are all identical so no need to order two or three different types... If you order a replacement strip, get a couple - you may need more than one if a different strip fails in the future.

You can replace a single LED in a string, but I have had to re-repair same TV for same problem with another LED 8 months afterwards.

Not a difficult TV to fix if you're careful.