LG OLED 65EG9600 no picture

[Daveleone]

Re: LG OLED 65EG9600 no picture

...

UPDATE: I finally got a replacement main board. Fixed. The original main board was the culprit.

Thanks for all your help, Diah!

[thepiecesfit]

Re: LG OLED 65EG9600 no picture

Quick update. I got a 2nd t-con board and ran some of the same tests as before (standalone mode, IN_STOP 0413, SWI3000). Still no picture.

I'm thinking this panel is bad.

Any luck? I'm having similar issue and already replaced all the three boards.

[Daveleone]

Re: LG OLED 65EG9600 no picture

Quick update. I got a 2nd t-con board and ran some of the same tests as before (standalone mode, IN_STOP 0413, SWI3000). Still no picture.

I'm thinking this panel is bad.

[Diah]

Re: LG OLED 65EG9600 no picture

..

from all the photos you showed here there are no sign on burned cells.. also this panel need to give it another chance..
some of the old version of this OLED panel module we can access to the panel driver boards and some cannot. but if you try got access to this. its not different from any other LCD panel could have ceramic caps shorted.

[Daveleone]

Re: LG OLED 65EG9600 no picture

this try will never burn or damage any parts of all 3 boards .. the only one will effected the panel.

Ok, I got brave and tried it. Did not burn up the panel. Basically, nothing different happened. Same as initial state.

- Plug in power
- TV relay click
- No picture. Not even a flicker of light.
- A few seconds later, got the TV input static sound.
- No picture. Not even a flicker of light.

Tested all the voltages.
P201: 24VS=24.8v, 12VM=12v, DPC=0v, P_ON=3.5v, DRV_ON=3.5v, 12VT_ON=3.5v
P202: 12VT=12v
P203: 24VD=24.8v

[Diah]

Re: LG OLED 65EG9600 no picture

I don't want to destroy my main board or burn my house down

I have a different idea:
- I am going to sell the T-Con AS-IS, and I will ask the buyer to let me know if it works.
-- If no, I will buy a replacement T-Con.
-- If yes, I will sell the main board AS-IS and I will ask the buyer to let me know if it works.
--- If no, I will buy a replacement main board (and t-con, since I will have already sold mine).
--- If yes, I will sell the power supply and throw away the panel.

this try will never burn or damage any parts of all 3 boards .. the only one will effected the panel.

[Daveleone]

Re: LG OLED 65EG9600 no picture

seriously let try one things

I don't want to destroy my main board or burn my house down

I have a different idea:
- I am going to sell the T-Con AS-IS, and I will ask the buyer to let me know if it works.
-- If no, I will buy a replacement T-Con.
-- If yes, I will sell the main board AS-IS and I will ask the buyer to let me know if it works.
--- If no, I will buy a replacement main board (and t-con, since I will have already sold mine).
--- If yes, I will sell the power supply and throw away the panel.

[Diah]

Re: LG OLED 65EG9600 no picture

You think it's bad panel? or bad t-con?
I am thinking it is NOT bad main board because main board power, optical LED, sound, and even network all work fine. Agree?

seriously let try one things.. please all who read dont do it.. its only for this threat..

put every things in place as original.. just slide out the wires from P201 power on & drv on & 12Vt on. leave others connected between main boards and t-con as well the lvds make the jumpers as you did at stand alone and let then turn on altogether... let see how the mainboard will display on screen with out protection

BTW: please put back the heat plate cover on mainboards and t-con

[Diah]

Re: LG OLED 65EG9600 no picture

Finally got a picture on the screen!

good work.. thanks for following

[Daveleone]

Re: LG OLED 65EG9600 no picture

...

Finally got a picture on the screen!

[Diah]

Re: LG OLED 65EG9600 no picture

if you are living at 3rd or higher level open yours window .. take alook be sure no one standalone down stair then thru the panel down... if you were at ground level.. then get it back to garage print my favorite Mustang shelby GT500 and glue it on the screen LOL

[Daveleone]

Re: LG OLED 65EG9600 no picture

so only do this please as stand alone..... leave all ribbon in place and run the test.. if you got black screen ( T-CON back to sleep) however i dont think so... do one ribbon disconnect to wake it up... then turn off and put back the ribbon and run the test with all 4 ribbon in. ON ON ON ON lol

With Ribbon1 disconnected, I get the image I posted. Even if I leave it on for 5-10 minutes, I still get the same image (no color pattern).
If I power off, plug ribbon back in, power on. I get brief flash of light on the screen and then black, as before.

BTW, 24v and 12v read correctly at F1 and F3 the whole time.

You think it's bad panel? or bad t-con?
I am thinking it is NOT bad main board because main board power, optical LED, sound, and even network all work fine. Agree?

[Diah]

Re: LG OLED 65EG9600 no picture

Sorry, yes. I edited my post to say "Standalone" but you read it before I could edit

so only do this please as stand alone..... leave all ribbon in place and run the test.. if you got black screen ( T-CON back to sleep) however i dont think so... do one ribbon disconnect to wake it up... then turn off and put back the ribbon and run the test with all 4 ribbon in. ON ON ON ON lol

[Daveleone]

Re: LG OLED 65EG9600 no picture

what standby mode and you are running stand alone test ???? i am lost cant follow you

Sorry, yes. I edited my post to say "Standalone" but you read it before I could edit

[Diah]

Re: LG OLED 65EG9600 no picture

With all ribbon cables connected, in standby mode, plug in, I do see a quick flash of light for a moment and then the screen goes black.
With the other configurations, the image you see in the pictures stays on the screen.
I will try disconnecting Ribbon1 & Ribbon2 and leave the TV on for some time and will report back.

what standby mode and you are running stand alone test ???? i am lost cant follow you

[Daveleone]

Re: LG OLED 65EG9600 no picture

i think you didn't give enough time to let the t-con play another color pattern ... let all ribbon in place ON_ON_ON_ON

With all ribbon cables connected, in standalone configuration, plug in, I do see a quick flash of light for a moment and then the screen goes black.
With the other configurations, the image you see in the pictures stays on the screen.
I will try disconnecting Ribbon1 & Ribbon2 and leave the TV on for some time and will report back.

[Diah]

Re: LG OLED 65EG9600 no picture

any way. please never disconnect ribbon test while mainboards in place..

so with this crazy stand alone test the t-con wake up, but i think you didn't give enough time to let the t-con play another color pattern so remain to sky blue.

when yours t-con wake up keep working with stand alone test... but let all ribbon in place, hope you will upload photo with label ON_ON_ON_ON and your screen lighting complete LOL

[Diah]

Re: LG OLED 65EG9600 no picture

Also, as a test, I disconnected Ribbon1 (the left-most ribbon when looking at the back of the TV) and powered on the TV. Relay clicked, and for a brief moment the screen glowed. Then the relay clicked off. I didn't run any more tests like this because I didn't want to risk sending the main board into protect mode.

did you did this while the mainboards connected?????

[Daveleone]

Re: LG OLED 65EG9600 no picture

micro led will be remarked with LD

Ok, I did find a label for LDI3200 near the LVDS cables. Is that it? If you look at the closeup photo of the LVDS connectors in post #25, you will see a box printed on the PCB to the right of the right LVDS cable that shows LDI3200 in it. If you follow the area that box points to, you will notice ... there is no LED in that location LOL Seems like I have a cheap model main board

test stand alone so this time you run the stand alone test but with disconnect the 2 ribbon cable of the 1/2 screen with distortion let see if the panel show any things

Ok, I tried this and I did get some illumination on the screen (btw, the red dot you see in the pictures is not coming from the screen. It is a reflection from my power strip). The photos are named to indicate which ribbon cables were connected at the time the photo was taken.

example:
[BACK OF TV]
Ribbon1 Ribbon2 Ribbon3 Ribbon4
ON OFF ON ON

...is labelled as ON_OFF_ON_ON.jpg

Also, as a test, I disconnected Ribbon1 (the left-most ribbon when looking at the back of the TV) and powered on the TV. Relay clicked, and for a brief moment the screen glowed. Then the relay clicked off. I didn't run any more tests like this because I didn't want to risk sending the main board into protect mode.

[Diah]

Re: LG OLED 65EG9600 no picture

another test could help . all ribbon in place as stand alone test... try to control the jumpers of 3.5V ....12VT_ON with switch. so you can control the contact like on and off... hope the t-con wake up and show some things on the screen. be sure the on off should be 10 seconds or more between them