lg tv 42lv450 does not start

[Moddingscreen]

Re: lg tv 42lv450 does not start

thank you very much for the advice, it will take 10 days to arrive, I will keep you informed. Thanks again

[Moddingscreen]

Re: lg tv 42lv450 does not start

It should and I say it should work, I do not know much about TV, I usually repair consoles and notebooks, but if my theory is the right one the card in question, even if it has a different code should work, I extracted the software for the 2 tv:
LG450A-ZC part number EAX64113202
LG450U-ZC part number EAX64290501

I passed them in hex editor is compared and to my amazement the 2 files are identical. attached photo,
what do you think?
is my theory right?

[Moddingscreen]

Re: lg tv 42lv450 does not start

hello, I received the card that I ordered, I mounted it, the TV turns on, but the backlight turns on for 3 seconds and then goes away, with a flashlight I can see the image what can I do?

[freakaftr8]

Re: lg tv 42lv450 does not start

You may have originally had 2 separate problems. Now you have a Flash of the backlights and the screen is working so in this case I would only assume That either the power supply is not keeping the back lights live or you have a bad LED in one of the LED strips.

Once again can you measure DRV on well the back lights come on in then turn off and tell us what the voltage is In both situations?

Also well the backlights are on can you see any dark areas within the screen

[Moddingscreen]

Re: lg tv 42lv450 does not start

I removed the LCD panel up to the LEDs, I started the TV and all the LEDs light up, only one LED is less bright than the others may be the problem?

[Moddingscreen]

Re: lg tv 42lv450 does not start

the power supply delivers 36.7v on both led strips

[freakaftr8]

Re: lg tv 42lv450 does not start

In this case I would say that your back lighting seems OK Did you have a chance to look at that the DRV on signal?

[Moddingscreen]

Re: lg tv 42lv450 does not start

it remains off

[Moddingscreen]

Re: lg tv 42lv450 does not start

if I use the classic 12v LED strips?

[freakaftr8]

Re: lg tv 42lv450 does not start

Hmm ok. Maybe if there can chime in here, however I believe DRV on should control backlighting and that voltage should go high when backlights are requested to stay on.

[budm]

Re: lg tv 42lv450 does not start

DRV:
"it remains off" What does it mean? 0VDC? or not changing state?
DRV (BL-ON) should change state when TV is toggle on and off, <1VDC = 0FF, >2~2.5VDC = ON.

[Moddingscreen]

Re: lg tv 42lv450 does not start

how much I get home control, but it has happened to me a problem, a LED does not come on anymore. that bad luck, that's why I wanted to go for 12v strips

[Moddingscreen]

Re: lg tv 42lv450 does not start

help me, I solved the problem of the backlight, I reassembled everything and I have the image upside down what I can do

[budm]

Re: lg tv 42lv450 does not start

So how did you solve the backlights problem?

[Moddingscreen]

Re: lg tv 42lv450 does not start

I changed the entire right LED bar, and the power pcb, but how do I now turn the screen upside down?

[Moddingscreen]

Re: lg tv 42lv450 does not start

from these 2 menú I can not do anything?

[Moddingscreen]

Re: lg tv 42lv450 does not start

I thought it was the flash to give me problems on the screen, I tried to swap, but I always have the screen upside down

[freakaftr8]

Re: lg tv 42lv450 does not start

This is not flash problem. This is eeprom issue. Do you have eeprom. Sop-8 style ic?

[Moddingscreen]

Re: lg tv 42lv450 does not start

this is all I swapped

[freakaftr8]

Re: lg tv 42lv450 does not start

That's odd. What you changed should have been it.