Panel is melting (SAMSUNG UE46D6510)

[fluxflux]

Dear Forum,

My Samsung UE46D6510 has some horizontal bars/flickering and as I touched the bezel at the mid of right hand side it was very very hot (my fingers are almost burned).

First I thougt there is something wrong with the LED Backlight but as I disassembled the Panel (LTJ460HW02-J) it shows that the panel melts.

When power is applied, then the melted area begins to smoulder and to smoke.







Question 1: Whats the Problem here?

Question 2: Can this be fixed?

Would be great if you could give me a hint.

Kind regards

FluxFlux

[tom66]

Re: Panel is melting (SAMSUNG UE46D6510)

1: It is a Samsung and the warranty is up so it is going into self destruct mode. Reality is probably a manufacturing defect leading to that driver IC failing destructively, although I've never seen one that bad! That certainly isn't normal. You may consider contacting Samsung about this as they may consider a good faith repair although I doubt it on a set this old (D series = 2011).

2: No. Unfortunately not without a new panel. At which point you may as well buy a new TV. Perhaps don't buy a Samsung again. They aren't very well built compared to other manufacturers and rely on marketing a bit like Apple rather than producing a quality product.

[fluxflux]

Re: Panel is melting (SAMSUNG UE46D6510)

Hi Tom66,

thank you for your fast reply.

Two more questions to get it correct:

1: The IC form the TAB produces more current that the PCB circuit inside the panel is getting to hot and burning?

Or

2: There are additional "falut" mini-ICs inside the Panel (kind of sandwitch) ?

Overall: For me it seems that this could lead to a real fire if I would have the set on and running while not in the room/house.

Thank You.

fluxflux

[tom66]

Re: Panel is melting (SAMSUNG UE46D6510)

1: There are components on that tab bond chip that are responsible for controlling the rows of the LCD panel. They select which line of the panel data is sent to at any given time. If the components go bad this could happen although it is really, really rare. Something must have gone badly wrong. It is probably drawing too much current from the T-con board causing the device to overheat. This would be almost certainly down to that chip on the tab bond, rather than any other part.

2: There is an IC bonded to each tab, sometimes two, which control various functions, generally controlling rows or columns of the display panel. Some newer panel designs use "gate in panel" technology where the gate driver chip (that drives the rows) is embedded into the LCD glass. The function is more or less the same but the cost of producing the panel is less.

Yes, this is a potential fire hazard so I would recommend reporting it to your local authorities and Samsung. While the plastic casing of the TV is usually made of flame retardant plastic, meaning it is unlikely that a fire would progress, it is still an unacceptable failure mode.

[Moreno83]

Re: Panel is melting (SAMSUNG UE46D6510)

There is a problem though , you opened up the tv and had the LCD out.

I would do my best to put it all back together , dont damage any screws etc. If they only find 1 small scratch they might say you did it yourself......

Hope you find a solution with Samsung.

[Davi.p]

Re: Panel is melting (SAMSUNG UE46D6510)

What solution? Warranty is out... and if he detach that side tabs as in an other thread?
Is possible a cleaning liquid spilling on the tab and making an overload?

[Moreno83]

Re: Panel is melting (SAMSUNG UE46D6510)

There is no solution but replacing the panel. His tabbonding is melting deu to heat.

Side tabs removal wont help. This is fault from the factory , not liquid. The tabs are on top of the tv not bottom

[Davi.p]

Re: Panel is melting (SAMSUNG UE46D6510)

"This is fault from the factory "
2 years and more to show a defect?? strange.. when you clean screen liquid can go on the side, top or bottom, seen in many threads...

[tom66]

Re: Panel is melting (SAMSUNG UE46D6510)

"This is fault from the factory "
2 years and more to show a defect?? strange.. when you clean screen liquid can go on the side, top or bottom, seen in many threads...

This is unlikely to be liquid damage as that tends to corrode. This is probably the silicon chip failing on the tab.
In any case, the high heat in that area has probably permanently damaged the liquid crystal matrix, so that is not usable any more.

[Davi.p]

Re: Panel is melting (SAMSUNG UE46D6510)

i was thinking of a liquid that don't dried and at the power up have made a short, but may be is all water proof on the side..

[tom66]

Re: Panel is melting (SAMSUNG UE46D6510)

i was thinking of a liquid that don't dried and at the power up have made a short, but may be is all water proof on the side..

Water rarely causes a short (DC resistance in 10~100kohm range.) Instead, it tends to lead to corrosion due to ion migration, which damages connections and reduces the effectiveness of insulation. Short circuits are very unlikely, although there is a small chance that water started a short circuit elsewhere in the circuit, causing this fault.