LG 42lb550-UY

[Zauberer]

hello, I have this LED tv and the screen does not light on when power button pressed

I tested voltage on LED wires and it is ~104, but on the board it is written it should be 208, so I think LED driver chipset is bad, but the problem is that I can't read markings on it, the chip was covered in some sh*t, after I scratched it I was unable to read, so here some pictures

1
2
whole board pics and

the first one is "fe 6n143da 6a0" which I believe is a Capacitor chip

the second one is unreadable which I believe is LED driver chip itself

so my question is - does anybody know the markings?
or maybe you know any other issues or am I wrong?

P.s. stupid photobucket (((( if you need to see pictures in full resolution you need to click download on photobucket using photo link ((((

[Zauberer]

Re: LG 42lb550-UY

1

2

whole board images

[Zauberer]

Re: LG 42lb550-UY

And sorry I made a mistake in the model number, it is not 42lb550-UY but 42lb5550-UY

[Hamie]

Re: LG 42lb550-UY

I'd say you have an open led rather than the power supply failing.

[Zauberer]

Re: LG 42lb550-UY

I'd say you have an open led rather than the power supply failing.

thank you for the reply, but what do you mean by "open led", can you please elaborate?

[mmartell]

Re: LG 42lb550-UY

The backlight system is composed of many LEDs wired in series. Whereas a shorted led will allow the string to still light (at least in the short term) an OPEN led will prevent the string from lighting at all.