Samsung UN65NU6900FXZA Vertical Gray/Dim Area

[Davi.p]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

do you use an electrical strip with switch to turn completely off the tv? does you use some other electrical devices on the same strip and which?

[80r15]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

do you use an electrical strip with switch to turn completely off the tv?

No. TV is plugged into Panamax M5300-PM and tv is turned on/off on it's own accord via macros.

does you use some other electrical devices on the same strip and which?

Yes, but other devices are on separate banks so the tv is isolated. On this specific power unit, the only other devices are Yamaha Aventage RX-A1000, Sonos Port, ATV 4K, everything else is connected to two more power units.

[Davi.p]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

i don't know which those devices are.. the only thing i can say is i have read on some threads about tv being hit by destructive spikes by some other devices in the same electrical area, like christmas tree lights, motors etc.

[80r15]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Samsung uses bottom edge for the led back lights, specially the NU mu models. The worst parts, if led failed or burnt, diffuser might be melted or cracked...

Well, it turns out that the new strips (one specifically) did just that. Installed them, everything looked spot on and back to normal, unfortunately one of the new strips didn't last twelve hours before failing on one side *and* overheating/burning/cracking the diffuser on the other half of that strip.

The big question is how/why the heck did a brand new strip fail followed by is it possible to get a new diffuser? I've taken a quick stab at it and have yet to find a source/vendor that has that part. Disappointing to see this being the end result for a three year old tv...

[Davi.p]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

As my.previous doubt, some electrical phenomena can be happened from outside the tv, otherwise it was a repaired strip with wrong leds but it quite impossible. The only chance for you is to register to sites like craiglist or ebay, do a search for the same model of tv with cracked panel and maybe do a research for same panel's models, and save it with email notify of new listings

[Storyteller12]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Hate to say it but the tv is trash. All the NU series are garbage from Samsung. They should be ashamed of this crap.

Don’t bother replacing the diffuser and light. It will just happen again.

I would invest in new a New TV with warranty. Or start looking for another tv from Craigslist etc. to repair.

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Hate to say it but the tv is trash. All the NU series are garbage from Samsung. They should be ashamed of this crap.

Don't bother replacing the diffuser and light. It will just happen again.

I would invest in new a New TV with warranty. Or start looking for another tv from Craigslist etc. to repair.

AMEN to that, some things just belong on the junk heap.

[80r15]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Hate to say it but the tv is trash. All the NU series are garbage from Samsung. They should be ashamed of this crap.

Don’t bother replacing the diffuser and light. It will just happen again.

I would invest in new a New TV with warranty. Or start looking for another tv from Craigslist etc. to repair.

New tv already in place (replaced w/ LG OLED). That said, it's one thing for the led strip to simply fail, it's another for a replacement strip (other side) to last less than 24 hours and burn the diffuser in the process. I have reached out to the supplier of the replacement strips and have yet to get a response**.

If this is a commonly occurring issue, it would be interesting to know what percent of the tv's have this problem and was this a known issued prior to production.

**Just got a response via email while making this post, we'll see how this plays out.

[80r15]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Update - supplier is pointing the finger at power supply. I won't have time to take a look at that until Sunday evening (at best), but off the cuff seems up in the air that the right side strip partially failed, then right after installing new strips the left side of the left strip failed within twelve hours and the right side of the left strip overheated and damaged the diffuser.

Thoughts?

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Nope, it's the fault of samsung, they put out this shit that is design flawed then refuse to admit liability.

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

has anyone checked on the current running to the backlights from the powerboard, its probably much higher than need be.

[lotas]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

has anyone checked on the current running to the backlights from the powerboard, its probably much higher than need be.

In all modern TVs, the backlight current is set almost to the maximum (limiting modes for LEDs) ...
Basically, the warranty passes and the backlight burns out - this is a business, the TV has broken, go buy another, new one.

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

^^^Indeed, they must have all got together and said here's what we will do, crank up the current on all tvs, you know what that is, a GD conspiracy. SHAME on them all.

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

and they can not use the excuse they wanted their tvs to be the brightest, because when they are cranked full bright they just look like shit and all washed out.

[Davi.p]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

what do you say Lotas? So there's no backlight setting in the user and/or service menu? I think i remember my MU series of my brother's Samsung it has.. what appears it haven't is the protection in recent Samsung, so maybe it sets a certain current but if one or a series of leds go burnt it doesn't notice and it start degrading with increasing tension to the leds until one or more catch fire and opens the line, maybe Samsung makes self extinguish foils and burns until backlight stops and user turns off tv... i noticed some newer series has a control pin with something like an error counter, since the only ic on the secondary is for backlight them probably goes into protection totally after few failing starts of backlight? Anyway comercial led strips are sometimes used ones taken from broken sets, if that set was broken due to electrical damage so a strip can be failing at moments, not all the semiconductors fails right after a power surge but also in hours.. bye..

[KYBOSH]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Update - supplier is pointing the finger at power supply. I won't have time to take a look at that until Sunday evening (at best), but off the cuff seems up in the air that the right side strip partially failed, then right after installing new strips the left side of the left strip failed within twelve hours and the right side of the left strip overheated and damaged the diffuser.

Thoughts?

If you want to give it another shot I would replace the LEDs strip with reputable ones (probably OEM pulls from another set).

As for the diffuser you can you can rotate it 180 degrees so what was top is now the bottom touching the LEDs. You can/should clean off the burned parts of the diffuser just to keep as much uniformity as possible.

With Samsung Edge Lit LEDs they say reduce the brightness to the very lowest setting you can find acceptable to watch TV. You wont enjoy it but as much as the flash and dazzle that having the LEDs on 100% will give you but it will prolong the life of your LEDs and screen.

[Davi.p]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

Rotating the flat sheet is ok but rotating the fresnel lens i would doubt..

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

lots have tried rotating, very few had a decent result, just puts the defect at the top.

[80r15]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

lots have tried rotating, very few had a decent result, just puts the defect at the top.

Yeah, as expected, rotated diffuser and not up to snuff. Add in that led's on strip aren't lit up evenly, could be strip, could be board, but doesn't matter since I've yet to find a source for a new diffuser. Samsung won't give me a part number and I have yet to find a part supplier that has the item available or the necessary information to look up the part. So, if anyone has a suggestion on how/where to find the part, that would be great, otherwise the remains are going in the trash...

[nomoresonys]

Re: Samsung UN65NU6900FXZA Vertical Gray/Dim Area

all I see is this, who knows if its legitimate or not, from what I gather it only goes to up to 55 inches tho, doesn't mention price either: https://www.youtube.com/watch?v=sawYS2pWS5k