UE32K5579SUXZG faded backlight on one side.

So, I've taken the back off. I've added the pictures to the original question.

I believe the top cable of the brown PCB is the one that goes to the backlight.

There are voltages written next to it, should I try and measure if those are correct or do you think that it's now worth the hassle? I can't really break anything by doing that, right?

Haven't yet dug further into the TV, since I want to keep dis- and reassembly to a minimum. Just a tiny bit scared of it. :)

There also was a sticker inside which I believe contains the chassis number, I just don't know which.

Do you know which one's the right one is? I have tried appending "backlight" to each and looking it up on eBay, but haven't found anything that seemed right.

Sorry, for asking so many questions, I just don't want to break anything and regret it afterwards. :P

You are correct. The top connector is for the backlight and you can measure the voltage on the connector. See what readings you get. If you disconnect the main board (green) from the power supply board the LEDs should light up and you would see the light through the little holes in the back.

Unfortunately, in order to replace the strips you will need to take the front frame and the screen to access the leds and to test which LED is faulty. That is not a hard job, but it can be daunting at first, because you may feel that you will break it. Make sure you disconnect the ribbon cable to the Tcon board first. That cable is the one that is folded.

The front frame should be just a clipped on frame which you can gently pry with your fingers from the screen side, working along the edge until it unclips. Then the screen would be free to lift up, then a few layers of diffuser sheets and then you'll get to the exposed LEDs. You will also find a model number on the strips so you can order the replacement.

My last comment was marked as inappropriate, so I hope this one won't...

I found the correct strip online after switching to DuckDuckGo, so that's done.

The only problem left now is that I can't figure out how to remove the old strip.

It feels like it's glued to the frame.

Should I try and use a solvent like IPA or maybe the heat from a hair dryer? Or just force it off? (Or is there some simple way to get it off, and I just didn't figure it out till now?)

I hope you can help me with this last problem.

I feel like I have to mention that you have been an enormous help. Not only that, but I literally couldn't have done all this without you. :)

Ok, now this is weird. While the backlight was exposed I carefully connected it to the power board and plugged it in. To my surprise the whole LED strip lit up. (Except the second LED on each side, but that can't be the main problem)

I assembled the TV again because who knows maybe to connect wasn't properly attached. But the middle was still dark...

I do see however two small dark spots on either end where the LEDs previously didn't light up. So yeah, there's that.

I believe this could be because of two reasons.

Either the LEDs in the middle stop working because of the mounting pressure when assembled.

Or there is a problem with the diffusion layer.

(Or something entirely different that I can't think of)

I will still change the strip since there were two dead LEDs, but I'm really wondering if there are actually problems elsewhere on the TV.

Once I get it, I'll maybe try and put the diffusion layers on while I have the panel removed. Maybe that will shine some light on the real problem.

I believe that changing the strip will actually help you get the dark line solved, as these LEDs are capable of producing very bright light and with the diffuser lenses on top, they will distribute the light evenly.

Some TVs have clips that attach the strips to the back panel which can be taken out nad put back after the replacement. Although on some models you actually need to use a bit of force to pop off the strips from the panel.