Samsung UE65F9000SLXXH

[WhiteWolfHellas]

Hello, I have this TV for repair and the symptom is that every black background has a red colour like noise. It is not visible in the menu though. I have removed and cleaned all the flex / cable connected on the boards, nothing changed. Is that main board issue?

[Diah]

log in service menu from STB state and from there do initial (hard reset ). after you check the white balance all channel value.. write it down over here or upload screen shoot.

[WhiteWolfHellas]

Originally Posted by diah

log in service menu from stb state and from there do initial (hard reset ). After you check the white balance all channel value.. Write it down over here or upload screen shoot.

IMG_20210227_100517.jpg

[Diah]

if you did hard reset from service menu and there no change.... for me its One connect problem

[WhiteWolfHellas]

Originally Posted by Diah

if you did hard reset from service menu and there no change.... for me its One connect problem

I did factory reset the TV and took a photo.
How can this be a One Connect problem though? The red background is pressent even with One Connect disconnected.

[Diah]

Originally Posted by WhiteWolfHellas

I did factory reset the TV and took a photo.
How can this be a One Connect problem though? The red background is pressent even with One Connect disconnected.

where are the photo its show this back ground with warning screen about connect the one connect ??????

[WhiteWolfHellas]

Originally Posted by diah

where are the photo its show this back ground with warning screen about connect the one connect ??????

You mean this?

IMG_20210302_093238[1].jpg

[Diah]

now its clear..yours mainboards integrated with T-CON ..?!!?

[WhiteWolfHellas]

Originally Posted by Diah

now its clear..yours mainboards integrated with T-CON ..?!!?

No, the T-Con is separate from the main board.

IMG_20210302_114941[1].jpg

[Diah]

Originally Posted by WhiteWolfHellas

No, the T-Con is separate from the main board.

in this case you need first to test panel reaction after you connect the one connect and feed video or other ports signal then disconnect one ribbon at time between T-CON and panel. to check if there are any different with it.

[WhiteWolfHellas]

Originally Posted by Diah

in this case you need first to test panel reaction after you connect the one connect and feed video or other ports signal then disconnect one ribbon at time between T-CON and panel. to check if there are any different with it.

Using the antenna signal (aerial) the screen turns black when I disconnect either of the T-Con flexes to panel.

[Diah]

remove the metal shield of the 2 boards the back one and the one at the middle. upload focused high resolution photos on both. we need to track the video signal R/G/B-Offset

[WhiteWolfHellas]

Originally Posted by diah

remove the metal shield of the 2 boards the back one and the one at the middle. Upload focused high resolution photos on both. We need to track the video signal r/g/b-offset

IMG_20210302_140416[1].jpg T-Con board

IMG_20210302_140408[1].jpg 3-D board(?)

[Diah]

its difficult to trace the signal walking thru. need to take a look on the other boards with black cover.

BTW: did the "one connect" socket connected to video processing boards ( the middle one ) via the Yellow socket clip?

[WhiteWolfHellas]

Originally Posted by Diah

its difficult to trace the signal walking thru. need to take a look on the other boards with black cover.

BTW: did the "one connect" socket connected to video processing boards ( the middle one ) via the Yellow socket clip?

main.jpg

The One Connect socket is connected in the main board. The yellow socket connects the main board with the 3-D board if that's what you are asking.

[Diah]

try first to clean and reseat the black LVDS cable from both sides.. then you have 3 gate IC on the manibiards close to this black LVDS. IC110-111-112 try to freeze or to heat to check any different at screen

[WhiteWolfHellas]

Originally Posted by Diah

try first to clean and reseat the black LVDS cable from both sides.. then you have 3 gate IC on the manibiards close to this black LVDS. IC110-111-112 try to freeze or to heat to check any different at screen

Did everything you said, nothing changed. Could it be a defective panel?

[Diah]

Originally Posted by WhiteWolfHellas

Did everything you said, nothing changed. Could it be a defective panel?

No,
if you did freeze or heating ICs 110-111-112 with no change.. then you have 90% BGA at the big chip.. look on the left side of the Ics where the print line goes.. at this side of the chip need flux and refellow

[WhiteWolfHellas]

Originally Posted by Diah

No,
if you did freeze or heating ICs 110-111-112 with no change.. then you have 90% BGA at the big chip.. look on the left side of the Ics where the print line goes.. at this side of the chip need flux and refellow

OK, I will do a reflow and report back, thank you for the info brother.