LG OLED 55EC930V Horizontal flashing lines problems

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

So I choose full array Qled tvs over oled, skip the edge lit.

[nomoresonys]

Re: LG OLED 55EC930V Horizontal flashing lines problems

I don't think oled was or is ready for prime time, witness all the problems in this thread alone. Just a little comparison without going into great detail: OLED vs QLED tv: Oled-better blacks: Qled-higher color purity, can get much brighter, big plus for me hate dingy whites, cost less, longer life span, more reliable imo, I'm satisfied with their blacks, clear winner Qled.

[mnjoao]

Re: LG OLED 55EC930V Horizontal flashing lines problems

good afternoon, I have a problem with the same TV, when I turn it on, the lg symbol lights up in white in front for 4 seconds and turns off again, the on command appears but the drive command does not, I have already turned off the power to the tcon board but it remains the same, replaces the main board but it didn't solve it, it doesn't give an error code, I put a resistance of 100 omios between the on command and the drive command (1 and 2 of p201) and the right part of the screen doesn't light up, I don't know if I should incriminate the display, help would be appreciated
mnjoao

[sut_boxer]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Seems like these OLED issues are never as simple as I had hoped. I have read/lurked alot here and was hoping swapping in a T-con board could help my TV.

I have yet to multimeter test the T-con board, and I am somewhat unsure of how to do it, so I considered just finding one on ebay and swapping it. You are so knowledgeable here.

Was a $2000 Tv so very sad that it just died outside of warranty. I am new member so apologies for adding to old thread.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

unfortunately the original eMMC is readable, but data corrupted, so it's impossible to copy between them, I checked both with HEX editor, and the data is organized in a different way, so is not the memory itself, is memory controller that is addressing data in a wrong way, the original one data seems to be shifted up. Since I got the vertical bands too, I wanted to try the latest version of that TCON, see picture attached:

new version
6870C-0477C LG550LUD-LGP2-X31 DESIGNED 2014 NOV 8TH

the one I have now is (OLD)
6870C-0555A LC550LUD-LGP1-831 DESIGNED 2015 JUN 10TH

I hope someone already tried this solution.
Thank you!

[Andrei_UK]

Re: LG OLED 55EC930V Horizontal flashing lines problems

What I found, is the new TCON and the old TCON eMMC contains almost same data, comparison was not easy, but data on the original is shifted up, it means the memory controller inside the eMMC is the real problem, it allocates memory in a bad way. So is IMHO impossible to recover original panel compensation and copy it, because part of the data are outside visible range coz badly allocated by the eMMC. Is clearly a Micron eMMC problem due to a bad chip sorting during production. What is "funny" is that piece costs only 4$ but makes a 2.5K TV unusable. So the only way is to replace completely the TCON but since the TCONs we found on ebay, are taken from shorted/broken panel TVs, the FPGA chip can be also partially faulty, this is why we get large vertical bands. The only way in my opinion is to resolder OLD TCON to the new TCON board. But we never get back the original calibration, we will always see halos somewhere. If we can access the eMMC memory maybe LG stored somewhere during production, it will be easier, but I don't really think it will be possible.

Hi , I m in the same problem, OLED55C9 T-CON switch OFF tv between 30-1m30sec so I bought new T-con and the problem is that I got vertical bands

Did you find in the end a way to copy data from old eMMC memory and write to new one?

Thank you

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Did you ever get to the point where you could compare the images of the eMMCs? Or possibly swap images to see what happens?

I am in the same boat as you with a 55EF9500 model. In my case, it would display vertical lines across the screen that would sparkle/shimmer. They would go away and come back randomly it seemed. I just replaced the T-CON with what seems to be an identical replacement as far as model, version, and other numbers on the board. It showed image retention from its previous TV home, but setting the compensation interval to 0 and turning off the TV cleared that up pretty well. Now I'm getting wide vertical bands... but the rest of the picture looks great.

I don't know if this TV is worth all this effort of buying a programmer, etc, but it still interests me. Depending on what you find, I might dive in for the heck of it. Is it possible to read the eMMC while it's on the board?

Craig

What I found, is the new TCON and the old TCON eMMC contains almost same data, comparison was not easy, but data on the original is shifted up, it means the memory controller inside the eMMC is the real problem, it allocates memory in a bad way. So is IMHO impossible to recover original panel compensation and copy it, because part of the data are outside visible range coz badly allocated by the eMMC. Is clearly a Micron eMMC problem due to a bad chip sorting during production. What is "funny" is that piece costs only 4$ but makes a 2.5K TV unusable. So the only way is to replace completely the TCON but since the TCONs we found on ebay, are taken from shorted/broken panel TVs, the FPGA chip can be also partially faulty, this is why we get large vertical bands. The only way in my opinion is to resolder OLD TCON to the new TCON board. But we never get back the original calibration, we will always see halos somewhere. If we can access the eMMC memory maybe LG stored somewhere during production, it will be easier, but I don't really think it will be possible.

[st0rmcat]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Is an eMMC to SD converter, since both uses the same pinout, is a very simple piece of hardware, the only thing that costs is the socket. With a WinHEX or similar software you can compare both images (donor board and original board eMMCs) and find the differences so "in theory" the compensation pattern, if not damaged, merge the images, and reflash it to a new eMMC.

Did you ever get to the point where you could compare the images of the eMMCs? Or possibly swap images to see what happens?

I am in the same boat as you with a 55EF9500 model. In my case, it would display vertical lines across the screen that would sparkle/shimmer. They would go away and come back randomly it seemed. I just replaced the T-CON with what seems to be an identical replacement as far as model, version, and other numbers on the board. It showed image retention from its previous TV home, but setting the compensation interval to 0 and turning off the TV cleared that up pretty well. Now I'm getting wide vertical bands... but the rest of the picture looks great.

I don't know if this TV is worth all this effort of buying a programmer, etc, but it still interests me. Depending on what you find, I might dive in for the heck of it. Is it possible to read the eMMC while it's on the board?

Craig

[diif]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Is an eMMC to SD converter, since both uses the same pinout, is a very simple piece of hardware, the only thing that costs is the socket. With a WinHEX or similar software you can compare both images (donor board and original board eMMCs) and find the differences so "in theory" the compensation pattern, if not damaged, merge the images, and reflash it to a new eMMC.

Apologies, it was hard to tell from just the screenshot. It looked just like an adapter for my RT809H.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

This is just the adapter for holding the eMMC it is not the programmer.

Is an eMMC to SD converter, since both uses the same pinout, is a very simple piece of hardware, the only thing that costs is the socket. With a WinHEX or similar software you can compare both images (donor board and original board eMMCs) and find the differences so "in theory" the compensation pattern, if not damaged, merge the images, and reflash it to a new eMMC.

https://www.aliexpress.com/item/3283...archweb201603_

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Sorry i forgot a passage, yes maybe the first case of emmc failure i've seen. In your first posts you told about a calibration, do you know what it makes? maybe in service menu there's an auto calibration system that uses special pattern images. I see i your pic that white balance returned NotGood, is there a way you can access a white balance setting? for example pressing 4 in menu 1?
can you photograph menus 8 and 13?

You mean the EZ_ADJ menu? BTW I have to remove the faulty eMMC first, since with that one I can see only the lower part of the image. Before doing that I have to study the right Programmer and/or find a way to program the eMMC on board.

[diif]

Re: LG OLED 55EC930V Horizontal flashing lines problems

In attachment the Programmer I found

This is just the adapter for holding the eMMC it is not the programmer.

[Davi.p]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Sorry i forgot a passage, yes maybe the first case of emmc failure i've seen. In your first posts you told about a calibration, do you know what it makes? maybe in service menu there's an auto calibration system that uses special pattern images. I see i your pic that white balance returned NotGood, is there a way you can access a white balance setting? for example pressing 4 in menu 1?
can you photograph menus 8 and 13?

Another thing, you are not sure about the tcon FW update success because the menu doesn't show the version, when you say Micom is tcon it s not true, it is a standby prcessor inside the main processor or outside on the main board, it will never be on a "tcon", so it is possible that you still have an old FW on new tcon due to fact that not every update contains an update for micom or tcon, maybe i that update there was only a micom FW.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

In attachment the Wav to IR files with my notes.

This TV unfortunately does not use VCOM, I'm unsure if its a general OLED rule.

About the FPGA, I tested the surface for temperature spikes that could eventually stress the solder lead free balls. For me, this Arria does not produce enough heat, I also removed it from the old TCON, LG in this case made a great job, the FPGA has a plenty of lead solder! Then after a proper reballing I resoldered it, the problem came out exactly as before. So I moved the original eMMC on the new TCON I purchased, and with it, the failure. So I'm sure, the eMMC is the problem. And we are talking of a 5$ eMMC... 5$ that made a 2500€ 55" TV a piece of junk.

In attachment the Programmer I found

[Davi.p]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Anyway i'm not so sure that OLED uses the VCOM tension, since i don't know if oleds suffer from image retension, since your first photos after screen board change seems yes. In lcd usually vcom is generated by a sepaeate chip, here i think is integrated onto main chip, so a correct flash programming is the only way.

[Davi.p]

Re: LG OLED 55EC930V Horizontal flashing lines problems

I was asking where do you have found the wav for instop, i've searched for hours without result. If you can provide to me a link or the file thanks.

Todays technology is afflicted by the onnipresent problem: the solidity of the chips, them are always thinner and thinner and much more integrated, the growt of functions and resolution is evident in tv between pre 2010 and after, the faults and the gravity of them growt in same way, unless you power supply them with a battery instead of a unstable electricity net theese are the results. I only one time seen an FPGA on tcon, it was on a 2007 Samsung and it suffered of BGA contact problems, the only one with this problem i've seen, it was Altera, there's not so remote possibility that the emmc/nand was ok but you with the hot reflowed a bit the FPGA unwanted and restored it, but ruined the emmc (??). There's a specific programmer for theese electronics called RT809H and costs about 130 euro with only basic accessories, you don't need other ones, it is needed oscilloscope and some training unfortunately by Chinese websites.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

What horrible technology, a screen control board that needs 8Gb of data... that's surprisingly ..
a screen then a 2000euro tv that needs to be replaced for an error on a memory on that board... engineers are going crazy...
how do you have sent In-Stop?
The problem is not much finding calibration data on a memory but reading that memory that needs to
posess a professional eprom reader.

Yes, horrible, they clearly pushed an early prototype tech to the masses just to be the first, otherwise why the TCON have an Altera(now Intel) programmable FPGA chip(!?) and a big eMMC memory like that? Clearly to compensate an un-optimized screens production line, where every screen came out with unique defects that have to be forcibly compensated by a custom by-zone calibration stored into an eMMC... almost unbelievable. Not counting the price payed for the set itself...

The IN-STOP was sent with a WAV to IR interface.

Now I'm thinking on buying a professional programmer, is around 150$, but read and write directly on the TCON will be better and since I'm sure this will not be a one shot try and solder-desolder the eMMC more than once will destroy the chip itself very soon. Unfortunately I'm not able to find the data connections by using a microscope, the board may be multi-layered and I don't know where to find the schematics. If someone have them, very welcome!

there are a lot of probe points, and more... there are two dedicated cable headers currently not used... see attachment

[Davi.p]

Re: LG OLED 55EC930V Horizontal flashing lines problems

What horrible technology, a screen control board that needs 8Gb of data... that's surprisingly ..
a screen then a 2000euro tv that needs to be replaced for an error on a memory on that board... engineers are going crazy...
how do you have sent In-Stop?
The problem is not much finding calibration data on a memory but reading that memory that needs to
posess a professional eprom reader.

[Diah]

Re: LG OLED 55EC930V Horizontal flashing lines problems

Sorry but I have to desagree please see attachments on my previous post here:
https://www.badcaps.net/forum/showpo...3&postcount=37

these bands shows with a new TCON. When LG replaces an OLED panel, the kit came with a TCON altready installed on the panel, probably because the TCON is custom calibrated only with that OLED panel.
When I soldered the old TCON eMMC on the new one, the TV showed exactly the same behavior as I opened the topic, so it is clear the problem is the defective eMMC that stores the factory calibration. In fact, the lower bar, the only piece of image the TV shows with the new TCON with the old eMMC does not show any vertical band.

i do know LG deliver OLED Module with T-CON driver boards with 4 ribbons installed.

i am talking on the issue you suffer as billiy

so we are at same boat.

if you talking on your fault T-CON driver.. always the answer replace as you did.

[maxino]

Re: LG OLED 55EC930V Horizontal flashing lines problems

vertical bands appear only when ribbon cable swapped or T-CON driver boards or some time MB replaced.. this all happen of changing the resistances of ribbon gate. to bring them back only by calibration equipment, which are expensive more than new TV for private user.

Sorry but I have to desagree please see attachments on my previous post here:
https://www.badcaps.net/forum/showpo...3&postcount=37

these bands shows with a new TCON. When LG replaces an OLED panel, the kit came with a TCON altready installed on the panel, probably because the TCON is custom calibrated only with that OLED panel.
When I soldered the old TCON eMMC on the new one, the TV showed exactly the same behavior as I opened the topic, so it is clear the problem is the defective eMMC that stores the factory calibration. In fact, the lower bar, the only piece of image the TV shows with the new TCON with the old eMMC does not show any vertical band.