LG 55EC930V OLED - 3 Second Power No Display

[kelznz]

Hi there, hoping to refresh this thread by seeking support.

Same model LG as per this thread.

3x clicks on power up then turns off. LG led lights up and turns off after 3rd click.

I have replaced Power cord (new), PSU, MB and TCon with refurbished components and still turns off after 3 clicks from power up. I do not have a service remote can anyone plz help?

[TeslaMichael]

Re: LG 55EC930V OLED - 3 Second Power No Display

Ok when the LG Logo stays illuminated then TV is powered up. if i remember you had to press exit with normal remote and then power off TV. in-stop should work too after pressing exit when TV started with bright LG Logo. can you try again?

[Bloopeta]

Re: LG 55EC930V OLED - 3 Second Power No Display

I have a problem, where turn TV on, it clicks and LG logo illuminates, 2 seconds later, clicks again, logo fades out, nothing else happens other than this, screen stays blank.

Have tried plugging in mouse and USB stick, nothing happens, still the same.

Have tried pressing power only on service remote, LG logo stays illuminated, but still no display, and unable to turn off again.
Pressing instop does nothing.

If I unplug the TV, and plug back in, the LG logo illuminates and stays illuminated, and anything else is unresponsive, Only way I can get it to shut off again, is to unplug a Tcon to driver ribbon cable

I have no microswitches on mainboard like others have.

[nomoresonys]

Re: LG 55EC930V OLED - 3 Second Power No Display

It may depend on the Country you are in: https://europa.eu/youreurope/busines...s/index_en.htm

[nomoresonys]

Re: LG 55EC930V OLED - 3 Second Power No Display

looks like another candidate for the European 6 year guarantee.

[TeslaMichael]

Re: LG 55EC930V OLED - 3 Second Power No Display

can't tell til you get a new cable, can it be carefully trimmed or is it too far gone.

It was the screen, i had a thread in this forum and we tested it.
forced panel on and half screen side was dark. it's sad because it was a expensive TV for these 4 years.

@tmaster21 ahh, sad to see your screen defective.. :/ but you can bypass it, to turn the tv on with broken panel. on the LVDS there is a pin "BURNT DET", i blocked this pin and then i could start the normally, then i saw on my tv the loading screen two seconds with stripes, then screen went black.
here is service manual with the LVDS pins

[tmaster21]

Re: LG 55EC930V OLED - 3 Second Power No Display

On mine. i forced "power on" an "driver on" and it startup the selftest . the screen is bad and the mainboard is in "lockmode" and on forced power on never shuts down.
but without "forced power on"dont respond to instop or instart, but respont to "power only". The result it's the same, or i forced power on or it shuts down in 3 secs.

https://photos.google.com/share/AF1Q...8tYjNDWjFyN3p3

[nomoresonys]

Re: LG 55EC930V OLED - 3 Second Power No Display

I have a problem, i got new Mainboard in my 55ec930v, its turning on, but got green lines. I saw, that i damaged a ribbon flex cable, there is one pin less. Is this the last problem, to get the tv working again with image? The cable is on the left side on the tcon

can't tell til you get a new cable, can it be carefully trimmed or is it too far gone.

[TeslaMichael]

Re: LG 55EC930V OLED - 3 Second Power No Display

Use RCoid App and download in app LG Service remote. This worked well with my old galaxy s5 and 55ec930v
BTW. Disconnect LVDS cable and TV should turn on or it's a MB Or A Psu issue

[tmaster21]

Re: LG 55EC930V OLED - 3 Second Power No Display

Hello friends. i tried anymote for the instop comand on my poco X3 pro that have IR but it dont work on this android anymore, any other app tha have this feature? thank you

ps: by the way ,my tv is off,i press on and it goes off after 3 secs. Even if i leave only the psu and mainboard connected. i gess its in error mode because any panel failure? but without unlock it i cant understand

[TeslaMichael]

Re: LG 55EC930V OLED - 3 Second Power No Display

I have a problem, i got new Mainboard in my 55ec930v, its turning on, but got green lines. I saw, that i damaged a ribbon flex cable, there is one pin less. Is this the last problem, to get the tv working again with image? The cable is on the left side on the tcon

[maxim2511]

Re: LG 55EC930V OLED - 3 Second Power No Display

I did new test, now in my room is dark and I could try one idea mentioned in here.
I disconnected signal tape from main board to t-con, and then try turn on with remote.
Especially corners on the left side and right side was lightening with low light. and after one second turn of.
With signal tape connected between boards , I have white stripe on top of screen for one second.

[maxim2511]

Re: LG 55EC930V OLED - 3 Second Power No Display

I want also mention that connecting usb with mp4 file dont do nothing, is not powering usb and read it. I see on usb stick that led light is very wick blink and stay dead.
I check power going to main board, and voltage is correct.
Voltage for t-con when I try turn on with remote is only rising very fast to 24V and then stops.

[maxim2511]

Re: LG 55EC930V OLED - 3 Second Power No Display

I have almost this same problem. I did step by step what is in this post, but i stuck in...
When I turn on tv using push button on main board and leave it for 3 kicks, mainboard looks like is powered, light on logo is of, but on screen still nothing happened.
When I use remote from tv to turn of, i heard click and power on again from remote i heard click and white strip on top of the screen. Then this blank, and i heard click like power is switching of.

I do future test with disconnecting black strip from main board to driver board, and tv looks like is turning on for longer time, but after 2 sec, i heard again click. (turned of)

I check voltage going to screen driver board, and i see for short period like try to power that driver with 24V but for some reason voltage is cutted of.
Interesting is that when I disconnect cable from power board to driver board, that board is warm ... that is when I make again turn on with push button for 3 click's.

looks like main board is supplying signal to screen driver board.

When I try put usb with video like someone was mentioning on the post's, light on usb stick just blinks, and thats all. Nothing happening, normally usb stick should blinking when is stick readed.

All other symptoms are this same like from higher posts. Red light led on main board blinks when I try normally power on tv with remote.
I am scared that I need chnge board, but question is which one I should change?

[zeks]

Re: LG 55EC930V OLED - 3 Second Power No Display

Respected colleague,
who can help in finding the error with LG OLED 55ec930v, which is talked about a lot here, but I did not come across a similar error.
The TV cannot be turned on (only 3sec power no display).
When I use only -power on the service remote the TV will not start every time, and when it starts, the picture is perfect for 2-3 minutes, after which it darkens and turns off.
Has anyone had a similar malfunction and how did they solve it?

[Rupero]

Re: LG 55EC930V OLED - 3 Second Power No Display

Hello,
I'm a new member here but have been mulling this over for a few days and after scanning the power board I noted an C3209 transistor which I assume is an 2SC3209 near the main board connector and just wondered whether this is a transistor switch that turns something on that could have failed.
English Pete.

[A. Lau]

Re: LG 55EC930V OLED - 3 Second Power No Display

Good morning I'm new here and come from Germany Would be great if you (her) can help me. Have a LG OLED 55EF9509 the device can not turn on unfortunately. Have the voltage measured on the motherboard and there are only 3.5v standby voltage. Is there anything I can do? Best regards

[Diah]

Re: LG 55EC930V OLED - 3 Second Power No Display

Hi,

No change,

im resigned to the point where the panel has failed, and is unrepairable. Sad really, only 4 years old with about 5000 hours run. I will for sure consider which TV I purchase next, I love the oled picture, but spending that anount on a tv, longevity must also be a factor, and 4 years for a £2000 tv is simply not good enough.

Anthony.

well sorry to hear that.. but i still on my thought your panel OK only if some one didn't damage it some how. i remember you wrote the issue happened while casting youtube. if the set wifi ( WLAN ) got defect or LAN too the set will have issue too it may same to yours. disconnecting WLAN module good enough and if its plugged in LAN and there are no IP address assigned to set when you log in router interface.. will lead you to some things.. always let mouse in the set to come cross the lock mode

[anthonyevs]

Re: LG 55EC930V OLED - 3 Second Power No Display

Hi,

No change,

im resigned to the point where the panel has failed, and is unrepairable. Sad really, only 4 years old with about 5000 hours run. I will for sure consider which TV I purchase next, I love the oled picture, but spending that anount on a tv, longevity must also be a factor, and 4 years for a £2000 tv is simply not good enough.

Anthony.

[Diah]

Re: LG 55EC930V OLED - 3 Second Power No Display

ok after you put back the ribbon did you turn it on ? put usb mouse and the pin drive with media content and turn it on.. tell how it look..
write e.mail to Billsy he is in UK too and ask him to try his second Main boards.