I have a 5 year old Samsung LED which appears to have a failing backlight as one side of the screen is very faint. I have seen some videos on repairs, and just wondering if anyone has managed it, and how difficult it was, or should I just recycle it.
Thanks
We had a failed backlight on our LED TV and I had the back off to investigate.
I've got 20+years experience in electronics design, manufacture and repair, but couldn't tell where to start. I think it was something to do with the power supply, but without circuit diagrams, I couldn't fix it, and had to take it to our electronics recycling depot.
Yeahnah, not really worth the time unfortunately.
Even the cost was prohibitive.
It's being done all the time in more price sensitive countries, so it's most certainly doable. Whether it's worth to do it in Australia is a totally different question.
I have fixed a Samsung with that issue. There are some youtubes that describe how to get to the LED array. Once there, you may find that a single blown led is causing a serial string to not light. I just tested individual leds to see which were working and which weren't. At this point you can order replacements off ebay, or, just solder in some little bypass wires to get the rest of the string(s) working (you won't necessarily see one or two blown leds behind the diffuser panel). I went with the latter until I subsequently found a samsung on the kerb (council cleanup) and grabbed the led strings from it.
Contact Samsung and they might send some people around to check it out. They roam the country in their van and replace mainboards and stuff.
I repaired a Sony 75in with a complete LED strip replacement kit from aliexpress a couple months ago. If it wasn't a large tv it would've gone to the recyclers but for the sake of $100 and a few hours work it was worth it to me to save my parents a couple grand on a new TV. Pretty fiddly work, would not recommend if you're not 100% confident. The LCD panel is super thin and you need to be patient with every little plastic trim you take off, removing the LCD itself and then removing the layers of diffusers and reflective sheets.
Don't bother taking it apart if you're not going to replace every strip because after you fix one of them, another one will break shortly after.
I did. I got a TCL backlight bank to function after a problem came to light, or actually went dark
1 bank was intermittent, mainly off. Unable to actually pinpoint the problem component(s), I figured it was a heat breakdown somewhere.
I put 3 red LEDs in series in the fly lead, 2 LEDS paralleled but opposite, 1 fwd, 1 back in series with the 3rd LED fwd biased. Purely experimental and the voltage/current drop was enough to allow full backlight brilliance. Been functioning ok for months..
1 red LED failed with just 2 fwd biased in series. Why the 3rd works I dunno. Maybe I had a dud one in the 1st test that failed prematurely.
try claim ACL from samsung as it's only 5 yrs.