My old 'purple splodge' TV for Zwift...
If I take the screen to bits I can clean the dust out and I have bought replacement backlights. The thing making me hesitate is that I would have to take out a very slim and delicate 40" LCD panel without damaging it, and then put it back again after changing the LED strips. There is a fair chance that I would wreck it!
I have replaced the light strips on a 42 inch LG TV and like you was a bit nervous about it, I followed the You Tube video and all went well, I put the TV face down on the kitchen table, you need plenty of space to place things as you remove them, I got the new strips from China, there are lots of different ones, so if you haven't got your replacements yet beware.
The problem will definitely get worse but it took about a year to get that bad so maybe I could get another 6-12 months use of the set before feeling compelled to have a go at sorting it out? I'll see how I feel after I get the Victory and have used it for a few weeks.
I have decided to do the repair
now! That splodge
would bother me!
I watched a new repair video this evening and reread
@Venod's comment.
The first video that I watched had the repairman lift the big very delicate LCD panel out of its metalwork and lean it nearby on its edge against a wall. That is begging for trouble!
The repairman in this new video commented that doing that often ends in disaster! The secret, as Venod says, is to leave the screen face down on a good flat surface and lift everything else up and away from it.
I will come back later and tell you how I
still managed to trash the set!
PS
I have now stopped for the night.
I finally got the set to pieces after spotting a couple of screws that I had initially missed. I definitely would
not want to have removed the LCD panel rather than the rest of the TV!
I wiped away 75% of the dirt from the diffuser screen. The rest of the dark patches seem to have come from discolouration of the plastic itself so not much can be done there.
5 of the 8 spacer pillars which hold the diffuser in place cracked when I removed them to take the reflector off and gain access to the backlights. The backlights themselves were easy to replace at that point. Hopefully, that will be the purple splodge sorted out.
I can't find the superglue which I want to use to repair the cracked plastic pillars. I'll buy some tomorrow to sort those out.
(I assume that superglue does stick brittle hard plastic?)
What I did find when looking for the missing superglue was the missing Samsung remote control!
I can't help thinking that this TV is not going to go back together easily or that something will have been damaged. I don't think that I would have a second go at fixing it. We'll see...