Re: LG 55EC930V OLED - swich on swich of no screen
Problem with ghosting and overturning pixels, is that peoples are setting screen to highest brightens , in tv is setting with power saver, where is lowering down voltage going to the screen, and protects pixels to shining with 120% power... That is settings for shops, that peoples who are looking for new tv will be surprised, and they will want to buy that tv..... Anyway, If tv is in full power, the glass screen is heating up slowly, when screen reach surten temperature, it affects pixels shining and because of temperature, pixels...
maxim2511
Member
Last Activity: 08-03-2021, 09:25 AM
Joined: 05-12-2021
Location: Weert
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Re: LG 55EC930V OLED - swich on swich of no screen
OMG
I think I figure out problem of ghosting on the oled screen. I am in shock. You will be also when You find out that. I will attach screen shot of that problem. Probably is overheated picture processor on the main board. 
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Re: LG 55EC930V OLED - swich on swich of no screen
I did order new boards, and Broken was TCON... Now I have different problem, and this is probably not problem of new TCON, I have almost black shadow in t he middle of the screen. It looks like there is not enough voltage, because when I have menu from operating system, and the rest is black screen, then letters are quite white, but when All screen is white, then whole screen is darkening, and in the middle of the screen is dark shadow. What more wired, is that when I change input from HDMI to 3, then is a lot worse.
Screen...Last edited by maxim2511; 05-17-2021, 11:39 AM.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
I try do it with arduino and IR diode, But didn't work. I think first I need have working main board for that. Because problem with IR was described when Main board was working, but TCON didn't display nothing. And to force to read eeprom, they use usb mouse, or usb stick with some movie. And in_stop In_start was used to break safe mode...
I think so...
Maybe I am wrong, but trying arduino didnt work, or I have bad codes used for different LG tv.
For now I cant boot main board, and yesterday I found out...Last edited by maxim2511; 05-15-2021, 02:14 PM.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
Somebody knows what is remote ir code for IN_START ?
I found post about IN_STOP code, but for my tv is not working. I want try wit IN_START
Post about codes for LG tv is [url]https://www.badcaps.net/forum/showthread.php?t=92649[/url]Re: LG 55EC930V OLED - swich on swic.../www.badcaps.nLeave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
I am thinking about that 11.4V if is not too low? Someone have experience with oled tv?
Also nice will be to get some pdf with testing points on board, maybe will be easier to find something unusuale.Last edited by maxim2511; 05-14-2021, 03:40 PM.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
There where is white arrow, is pointing straight to that coil. I am wondering that for me 0.9v is bit too low. I think it should be more then 5v?
I read PDF about that chip, and this is Buck converter. Is step down voltage. PDF say that output should be something 0.6 to 5.5v but that big coil. Hm..
Capacitor near that coil have 0.26ohm.
Also I notice that when I try turn on with remote, that coil have 0.9V, and then goes to 0V, like is switching of earlier and then I heard click from power...Last edited by maxim2511; 05-14-2021, 01:21 PM.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
what about tpss3513 TI 481 CE8S
This part is on main board, and is close to coil, that coil is showing me 0.9V, but higher place there is 11.6V, yeah, almost 12V . I think this go to main procesor. When I put main board on hard turn on using botton on board, procesor is heating on like it could working, but I dont see light from optical fiber.. Coil it self is quite big, and so smal voltage is wired for that big coil.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
I just find video on Youtube that somebody get hand on Oled tv and He had also problem with not turning on tv.
[url]https://www.youtube.com/watch?v=qpCO49sDznI[/url]
on this movie now I get clue for my question, doo main board will work if I will disconect TCON board from main board. And Yes! It should work.
That means that I have problem in main board, because still is turning of .
Do anybody knows where I can start looking for issue in main board?Re: LG 55EC930V OLED - swich...Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
No problem,
...
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Re: LG 55EC930V OLED - swich on swich of no screen
Yes, i did that, no change. I read on another post on this site that Oled tv is not working like normal lcd displays, and this could not work. Anyway I try it and no change. I disconnected them all also, no change....Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
I know. Me too. But I did more testing at that place, and I do trick to light on screen for that second, and That place where I was thinking is bad, show me 1.0V, and I think is enough good. In stand by mode that voltage is lower to 0.9V.
Then The problem must lied somewhere else.
If I disconnect TCON in working tv, do main board should work normally? Or is detecting that Tcon board is missing and anyway will not turn on? I mean, if main board can work without TCON conected to...Last edited by maxim2511; 05-14-2021, 07:09 AM.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
This part have strange number....Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
US2 - 0a=1e 62r
q17 - m9c025 1137 1437b1
q23 is this same....Last edited by maxim2511; 05-14-2021, 06:53 AM.Leave a comment:
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Re: LG 55EC930V OLED - swich on swich of no screen
I try one more time with tcon board. And I found something strange in voltage. One of coils should have output of 1.15v but there was 0.3v. Then I check capacitors, all of them was good. Then I dismount coil it self, because I was not sure if one of voltage regulators say blown. No there are good ones.
When I check resistance of input of the coil and output without mounted any of that capacitors on that place, I found that output is 26ohms. Now I don't know where that output is going to. I will catch pictures of that board....Leave a comment:
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Re: New Members - please post your introductions here
Hello. My Name is Kristof, and I found that formu with very helpfull posts. main rason why I join is that My Tv gets broke with my fold, and now I need help. I already learned a lot about modern tv. And I will be happy to be a member of that site.Leave a comment:
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LG 55EC930V OLED - swich on swich of no screen
My Oled Tv is 55inch tv, 3 days ago I notice that middle of the screen is getting warmer and on picture I have ghosting, missing red color. Color red was still displaying, but it was not so strong as corners of the screen and watching some movies makes me angry.
Then I get an idea to take it apart and clean boards from dust.
In side of Tv was not so bad, I take compressed air in can, and gently blow up.
Also I was thinking to styrofoam sponge to isolate power board from screen that the middle of the screen will not worm so much. Because Led on screen when gets higher... -
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.Last edited by maxim2511; 05-12-2021, 03:05 PM.Leave a comment:
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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.Leave a comment:
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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...Leave a comment:
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