LG OLED 55EC930V Horizontal flashing lines problems

[mmartell]

Re: LG OLED 55EC930V Horizontal flashing lines problems

I have yet to come across an OLED but won't that clear itself up after a few power cycles ? I remember freakafter8 had something similar happen to an OLED he was working on and the problem vanished without him doing anything iirc.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Good news and unfortunately bad news, today I replaced the TCON board with a refurbished one, the picture now is almost everywhere lit at high "OLED light" settings (Standard value is 60), but at normal viewing light (set 10-30) the screen shows a very strange behaviour! In the upper left corner, I see something strange, an "a" that in my opinion is a part of a TV emblem. The rest of the image especially at the bottom is faded out a lot.

Just to clarify, this TV was never used with TV sources, only for BD movies and streaming service like Netflix, so TV emblems are really unlikely to be there...

Correct me if I'm wrong, it seems the used TCON is retaining the picture of the old TV from where it was taken. Is that possible?!?

Please kindly see the pictures below, I already did a factory reset and then a IN_STOP to reset the TV, but with no change.

Thank you!

[Diah]

Re: LG OLED 55EC930V Horizontal flashing lines problems

PS: about the Raspberry... I tried to send IN_STOP but it doesn't work at all. Have I to send it when the set is ON on in Stand-by? (The POWER_ONLY works) Does the reset button on Main Board button do the same?

regarding IN_STOP.. because you couldn't see what are showing on the screen.. after you turn the TV ON and stay on as you have
ust picture at the bottom on the screen.. sent the command then follow it to press on the RC 0413 the set should go to stand by.. if it did... mean it got it and rest the eeprom of the set..

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

at your case your OLED panel didn't have short at all.. as you don't face shut down by Panel SOS signal.

i suggest you read this post and do the test carefully then post yours screen photo.

edit: one things more if you suspect the adrino Raspberry its could be reason too.. sending "INSTOP" command to the TV could solve any problem related to input and resolution too.

Thank you Diah to set in!
So I downloaded the SMPS testing procedure since was mentioned in the original post, but I have a lot to study at this point, believe me I'm little scared but I'll do my best to figure out what to do. I'll post an update ASAP.

PS: about the Raspberry... I tried to send IN_STOP but it doesn't work at all (or maybe there is a dialog box I can't see). Have I to send it when the set is ON or in Stand-by? (The file POWER_ONLY.wav works) Does the reset button on Main Board button do the same? Because I did the reset to let the TV turns on after the ribbon cable disconnection attempt.

[Diah]

Re: LG OLED 55EC930V Horizontal flashing lines problems

At this point I just ordered a new TCON board on ebay, but I'm almost convinced it's a Main Board problem.
I just remember I disconnected a Raspberry Pi 3 before the problem appeared, without turning off the set... can be the disconnection of the RPi caused some components burning on the Main Board?.

at your case your OLED panel didn't have short at all.. as you don't face shut down by Panel SOS signal.

i suggest you read this post and do the test carefully then post yours screen photo.

edit: one things more if you suspect the adrino Raspberry its could be reason too.. sending "INSTOP" command to the TV could solve any problem related to input and resolution too.

[budwich]

Re: LG OLED 55EC930V Horizontal flashing lines problems

sorry I wasn't looking at the picture right... :-(

Anyway, you might try doing a few voltage checks at tcon and at the edge board at the bottom of the set... if there is some labelling on the boards to provide some guidance to those points. From some past oled posts, it is unlikely that you will get any picture if you disconnect the tcon to panel cables as there is some circuitry / system that shuts the set down when in this condition (equivalent to bad panel). You might search for some posts from freakaftr8 where he had an oled with panel damage and another with potential board issues...he was able to work thru getting one set working.

Your picture appears to indicate a lack of signal getting thru to the panel (ie. open circuit) or no voltage.

PS... I just missed your previous post but it looks like you are heading towards a replacement tcon... hope it works out.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

So I tried to remove ribbon cables in this order:
1 - the both on the left (turns on , white line on the left, growing-descending from the top of the screen for about 2 seconds, but also below the level normally the panel is not illuminated properly (!?!) The rest of the panel is faintly lit everywhere, then TV turns off by itself)
2 - only the first ribbon, same as above, but the growing white line take all the screen width, 2 sec, then turns off.
3 - only the second ribbon same as 2
4 - only the third ribbon same as 2-3

After that it can't be able to turn on the set anymore, so I pressed the reset button on the Main board, the TV works as before, the air mouse pointer moves. So no improvement for now

VIDEO
https://youtu.be/_XyHyBkK8vY

At this point I just ordered a new TCON board on ebay, but I'm almost convinced it's a Main Board problem.
I just remember I disconnected a Raspberry Pi 3 before the problem appeared, without turning off the set... can be the disconnection of the RPi caused some components burning on the Main Board?

Thank you for your help.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

this thread might be somewhat "equivalent" if you look at his last picture of what the panel is doing... almost the same kind of "linings" but in reverse video (ie. white background). Poster indicates a shorted panel. :-(

you mean this one?
https://www.badcaps.net/forum/showth...hlight=lg+oled

- since the last pictures in my opinion is not a picture of the panel, I glimpse something at the bottom like a metal frame
- moreover, the lines are moving fast on my set, and they are part of the current picture, so strange behavior

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

OLED tvs seem to have lots of panel problems, seems like the technology as it progresses is getting more unreliable. What I see, CRT tv very reliable but not the greatest picture quality, then going downhill in order lcd not too bad, led constant backlight problems mostly, oled great picture quality but panel and constant picture issues banding artifacting etc. Left out plasmas, the first plasmas I came across had 3 or 4 very noisy fans so never was interested in owning one.

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Maybe try the disconnect one or two ribbon cables from the tcon to panel test, one side at a time and see if you get half a proper display(always disconnect and reconnect cables with tv unplugged from power)

[budwich]

Re: LG OLED 55EC930V Horizontal flashing lines problems

this thread might be somewhat "equivalent" if you look at his last picture of what the panel is doing... almost the same kind of "linings" but in reverse video (ie. white background). Poster indicates a shorted panel. :-(

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Ok, this is what I got with the IR-WAV interface, unfortunately impossible to navigate in the menu...

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Good point, I'll try to enter the Service menu again, but I'm not sure I can blindly reach this option with the screen in these conditions.

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Ok, looks good, must be some other issue. Don't know unless a factory reset or firmware update may have reset it??

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Yes, I disabled it using a IR led connected to a 2.5mm jack, then played a special wav sound with a laptop with the TV off, and the Service Menu appeared. Then disabled the TCP, I'm sure I archived a picture of the screen somewhere.... trying to find it.

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

As far as I Know, TCP has to be disabled in the service menu, is that where you disabled it from?

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

thank you, if TCP = ASBL (so it means the display auto dim after 60 sec of inactivity right?) it was already turned off years ago during a calibration session.

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

App is there: https://play.google.com/store/apps/d...id.lgsm2&hl=en

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Most don't have a service remote, there's an andriod app that can get in, if you can get in go to OLED>TCP Enable set it to 0 and exit.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

yes, the power cord is the only thing connected
I made a IR - wav cable in the past to disable the screen dimming during calibration, so I could eventually try to access the service menu.