Chosen Solution
I did the flashlight test and you can see that it has image but there is no backlight, do I have to replace the t-con board? my TV is a samsung un58h5200ag Update (05/16/2018) These are all the boards my tv has, sorry it took me so long to post, what are you looking for in the pictures?
@diy_ this is most likely not a t-con board issue but a backlight issue. No reason to change the t-con board. Post some images of all of your boards and the layout of the boards on the TV. I suspect this to be a power board/ LED driver board issue. Samsung is plagued by bad capacitors and this may be one of those cases where it will help if we can see what you see. Adding images to an existing question Update (07/08/2018) disconnect the cable going from the power board to the main board connector CN803. Then turn your TV on. All of your backlight should come on. Measure the voltage on CNL802 for the LED’s. It should be somewhere in the 113 VDC
