LG OLED C1, SOS-Turn Off, Stand alone test

[ThetraXXL]

Hello guys,

I recently picked up an LG C1 in 65 inch size. Previous owner told me that the TV won‘t start, so I did believe due to PSU issue, but not this time. I could narrow it down to the T-Con or Panel.

PSU and Mainboard work both like intended, all Voltages available, Optical on when T-Con lower Ribbon is disconnected and I even managed to get some picture with P-Only, IN-STOP cycle but only for 2 sec. before shutdown.

For the stand alone test the panel starts with some flashing horizontal white lines and then continues to build up some color on the left side of the panel with increasing in brightness and variation over a time of 5-10 minutes. See the attached pictures.

I‘m now stuck in further investigation on how to determine if it‘s and Panel or T-Con issue. Btw all fuses at T-Con are continuous.

Greetings from germany,

Theo

[Diah]

you need to exit power_only first ...disconnect the EVDD 24V from T-con side... turn on... optic will lit on... give time for it at this state.for 5 minutes,. install camera at the front of the screen if you don't have one help you..... while the TV ON plug back the socket you unplugged before let see what will the screen showing

[ThetraXXL]

Only the welcome screen like I‘ve seen before already. With some artifacting lines in the middle. After 1-2 sec. it powers off automatically.

[Diah]

do it again please before you put back the socket... press Ok on RC to pass the first page so come language page.. so we can see whole screen not only at the middle.

[ThetraXXL]

Alright, I did like you described. Uploaded a short clip on youtube. https://youtu.be/NooYblfm0JQ

[Diah]

Alright, I did like you described. Uploaded a short clip on youtube. https://youtu.be/NooYblfm0JQ

ok. this noise from T-CON or at he buffer boards, i would go to invest with T-CON from same size and model.

[ThetraXXL]

Alright, I‘ll do so.

I also own another TV: CX running on an C1 mainboard

But I assume because T-Con and Panel are married It won‘t work swapping the CX-T-Con with the C1 one?

[Diah]

Alright, I‘ll do so.

I also own another TV: CX running on an C1 mainboard

But I assume because T-Con and Panel are married It won‘t work swapping the CX-T-Con with the C1 one?

you can compare both if MB work on it then T-CON will too.. for more sure show here the both in high quality photo

[Diah]

yours steps when you plug back EVDD socket... it show part on left side blue... then clear image... then horizontal. start1 OLED Cells , start2 and 3 T-con reaction... this why must invist on T-CON first if not then need to cutting the cover metal plate to have access to buffer boards

[ThetraXXL]

So I tried the T-Con from my working CX and unfortunately it creates a similar error with the artifacting lines in the middle.
https://youtu.be/xenV1ih4fDU

So I guess I‘m going to cut the TV to get to the buffers…

[Diah]

So I tried the T-Con from my working CX and unfortunately it creates a similar error with the artifacting lines in the middle.
https://youtu.be/xenV1ih4fDU

So I guess I‘m going to cut the TV to get to the buffers…

before you go to dirty repair,,,, try the working Mainboards of this T-CON

[ThetraXXL]

before you go to dirty repair,,,, try the working Mainboards of this T-CON

I swapped all working parts from my CX to C1 and other way around. Exactly the same results. CX working with both sets of Tcon and Mainboard and C1 same lines with the running HW from the CX.

now I‘ll to the dirty work