LG 70UH6350 Mainboard issue

[nomoresonys]

Not sure, guess you could take out the caps closest to it, see if the cap tests good out of circuit, I would start with the biggest first, there's the freeze technique also seen lighter fluid used, have tried lighter fluid but I think freeze spray is better.

[nomoresonys]

https://www.youtube.com/watch?v=qC9FEZ78-qM

[Storyteller12]

I did some more digging around and found a coil that is shorted to ground. Not sure how to properly trace it out from here though without schematics. Coil is labeled L2307.

[diif]

Originally Posted by Storyteller12

I did some more digging around and found a coil that is shorted to ground. Not sure how to properly trace it out from here though without schematics. Coil is labeled L2307.

If you've disconnected the coil on one side you can see which side the short is.

[nomoresonys]

wondering what happened on this one?

[Storyteller12]

I found a used mainboard for it and fixed the problem.

[diif]

So you have a working board to compare with the broken one or have you stopped now the TV is working?

[Storyteller12]

Actually I didn’t find the exact same mainboard. Very hard to find and if you do there very expensive. . I found the commercial version mainbboard used for hospitality use. It works all the same just no Wi-Fi.

I sold the tv to a business for digital signage use

[nomoresonys]

Well done, glad you were able to give that monster a new life, cool that you could use another mainboard.