Have TV Questions? Ask a TV Technician
Hi , I`m JackPerhaps I can help you with this problem , a few questions coming up and please note that it may take a few minutes between replies;Do you mean the screen comes on briefly at startup and turns off ?
O.k then wish you had come hereto start with , you would`ve saved on parts and time .
Where did you get your boards anyway
Answer coming up in a minute
By the look of it I`m afraid that what your tv has is another case of defective LED strips and this is very common for LG and Samsung TV's , they both use the same trips anywayThose LED`s are supposed to last a zillion hours but they do not , they are failing all over the place and not only in LG and Samsung
Here is a link to give you an idea what is needed ;
Mind you they don`t have it in stock at this time , these guys can`t keep up with the demand but if you were to look into this yourself then you could sign up there to be notified when back in stock but i must say that this is not an easy job to do and you will have to be comfortable working with electronic circuits , here is a video that shows you how its done , not your model but the same job ;
Let me know if you have other questions and if not then please do not forget to rate by clicking on the star icons at the top, then click on Submit so i get paid for my time helping you .Also note that it will not close this post , you can come back here at any time if you need further info or help .Thank you