LG OLED55B6V dead ! Please help.

[markolino]

welcome. I have owned an OLED TV for several years, the LG model OLED55B6V

a few days ago that I would turn on the TV like every day.... puffff, the TV is dead. I press the button on the remote... a relay clicks and the light blinks red 3 times then stops. it is necessary to turn it off and on again to repeat the process

i tried the method of holding the physical a button note while plugging in the main power cord and no luck.. in short, any idea what could be wrong??
al main board al power board ??
your opinion?

you can also watch my video below

https://youtu.be/SHWWFqM7seE

[markolino]

Re: LG OLED55B6V dead ! Please help.

MR @Dish, are you familiar with this error?

[EazyBone]

Re: LG OLED55B6V dead ! Please help.

Probably electrical failure. Capacitor failure in power board or power board itself could be likely.

[markolino]

Re: LG OLED55B6V dead ! Please help.

aaaah. which capacitors have high voltage (primary) or low voltage (secondary) at a glance, they are all ok.

the big ones that are put together at the primary voltage show me 250Uf, all three together. i.e. 80uf x 3, it says that they are from 100Uf.

but I found 1 yellow capacitor first from the right and it is short circuited.. maybe but that's how it has to be?? the rest are not..
I will mark it in the picture.
Model of Power Board is: lgp55b-16op

[R_J]

Re: LG OLED55B6V dead ! Please help.

The point you circled on the trace side of the board is NOT the capacitor, they are the same points of the trace.
Check the power supply voltages, they are marked on the board.

[EazyBone]

Re: LG OLED55B6V dead ! Please help.

Found this while searching for my problem. Use English captions

https://youtu.be/pSRxAuLAwSU

[markolino]

Re: LG OLED55B6V dead ! Please help.

yes, in this video, we change the main board, but the error indicates the power supply.. in this video, there is no reason at all how he found the error, he just replaces it.. anyone can be such a repairman

my situation is a little different. in his video the red light comes on immediately when he turns on the AC

in my case, when I plug it into the mains, the sound of the relay is heard. and the red light flashes quickly.
I'll wait a few seconds. and when I want to turn on the TV with the remote or the button, the click is heard again and after 2 seconds the sequence of flashing 3x red light starts

[Diah]

Re: LG OLED55B6V dead ! Please help.

there are no blink code count on LG OLED. the 3 blink are normal at any start, its described each blink as running one start script. so this bring nothings to you keep watching the blink.

OLED trouble shooting we do wrote several time at any of OLED threat. read them all ...you need
1- test PSU as stand alone ( to be sure the PSU produce all required currents to MB or T-CON driver boards
2- running the T-CON driver boards as stand alone with help point one. ( to know if the Panel module have short cells or not or burn )

so read please all threat . and there the answers you will find.
my answer guilt for @EazyBone threat too

[markolino]

Re: LG OLED55B6V dead ! Please help.

ah, so with OLEDs, they don't have a way to look at the error lights..

[EazyBone]

Re: LG OLED55B6V dead ! Please help.

there are no blink code count on LG OLED. the 3 blink are normal at any start, its described each blink as running one start script. so this bring nothings to you keep watching the blink.

OLED trouble shooting we do wrote several time at any of OLED threat. read them all ...you need
1- test PSU as stand alone ( to be sure the PSU produce all required currents to MB or T-CON driver boards
2- running the T-CON driver boards as stand alone with help point one. ( to know if the Panel module have short cells or not or burn )

so read please all threat . and there the answers you will find.
my answer guilt for @EazyBone threat too

This is why I am here for direction. If I knew where to look I wouldn't be asking, I've went through many threads but it's hard to read all these things I don't fully get. If it's already answered then I'd someone can just link the thread and is gladly look at it to get my answer. I don't know how to test pay, and I don't know how to test tcon standalone. Trying the best I can, if there is the thread for this can you link it? Thanks

[markolino]

Re: LG OLED55B6V dead ! Please help.

I made measurements when everything was connected normally, I had accurate measurements on all pins, except for 24V, there was none.
when I turned on the TV, it showed 7V on the pins where it goes to the T-Con

and on the return from the MB on the DRV-ON pin it was 0V

PWR-ON has 3.7V
then I made a jumper between PWR-ON and DRV-ON so as to force the power board to trigger 24V
and here I really turn on the TV, the relay click shows 24V on all the pins that go to the T-Con board, but there is no picture. The theme is perfect..
so I conclude that the Power Board is working...
but I don't know how to force the power board itself without MB to start all the necessary voltages? because with PWR-ON I need 3.7v and DRV-ON equally..
any advice?
below are some pictures..
I also tried disconnecting the LDSV cables from the MB to the T-Con.. the thing is the same, there is no picture.
I tried to disconnect all 4 flat cables leading to the panel.

In short, I assume that here the MB board is not working as it should... because it does not trigger DRV-On

[lotas]

Re: LG OLED55B6V dead ! Please help.

This is LG. The motherboard has locked up due to panel errors.

[markolino]

Re: LG OLED55B6V dead ! Please help.

how could I try to reset it in some way??

[markolino]

Re: LG OLED55B6V dead ! Please help.

so I have nothing to do without a service remote control?

[markolino]

Re: LG OLED55B6V dead ! Please help.

the thing is like this. Here I bought a service remote for an LG TV

where on the forum can I get info on how to use it?? where do I know how to factory reset the motherboard? I'm looking but I can't find it

please someone help me.
remote control image.

[markolino]

Re: LG OLED55B6V dead ! Please help.

Hi guys.. Hwer is the button for reset???