So you suggest changing the diode arrays?
Sorry if i upset you in any way, that was not my intention.
I have no clue what recent discussion you mean.

There where some, some ICs, and 2 that looked like diode/resistor arrays. I checked the arrays for short against ground, had none.
Could not identify where the line that i taped go to. I am almost shure the line do not go directly to an IC.
Since this TV is so big i would have problems to change any chips on the panel strip board anyway.

Is everybody sure that a change of the TCON board would not help in this case?

There was no short that i could meassure. Or i didn´t find it.
If i tape one specific pin of the 12 datalines in the picture, i have a picture on the TV.
Problem is, it is flickering if there is motion.
So that is no solution.

i can check the caps on the buffer board, will do that again (checked only AVDD line).
But how can i check for other shorts on the buffer board?
Where would they usually be? On "data" lines against ground?

You mean a short in the panel itself, or on a capacitor at the small board on the underside of the panel?...

I can try to order some LVDS cable if i find a reliable source.
And then? Perhaps change the TCON board?

I really thought it would be definitely a panel related error, since half screen works after disconnecting right FFC Cable TCON-Panel.

Thanks. That was the area I taped.
But as I said, after taping, picture looked OK, untaped the pins one by one an after unmasking all, picture stayed OK for half an hour. Then all grey again.
I think I try it again.

Strange thing was, even with these 12 lines taped picture looked not distorted, no lines, it looked perfect.
Can that be? I would have expected a bad looking picture when all lines are taped....

I guess not in my case, since disconnecting right cable tcon<->panel gets me a half working screen.
That's why I ruled Mainboard and LVDS out. Was that wrong?

​​​
Anyone an idea where on the picture the clk lines for taping are?...

It´s getting weired ;-)
I meassured no short at AVDD line.
So i tried the tape method.
I doubted the right pins were on the right outside of the right connector, since the lines are kind of thick and marked with V...
So i masked 12 lines that looked right:

Wow, it worked, full screen visible. (and AVDD ob both connectors now 15V, before only 15V on both when only left connector was connected and half screen was visible)
I then unmasked one after the other of the 12 lines, (off course turned off TV each time.).
Even after unmasking all lines Picture...

Hillarious :-) but i am just an old fan of him since he played in a team i like


ok, that seems plausible, i will check in a few days if there is a shorted cap


Sorry, i tried to understand this sentence.
Do you mean taping does no work (reliably)?
Where are the gate drivers? directly on panel, unaccessible? Or on the small board of the Panel that holds the connectors to the tcon?
And where and why and what would be the current deficit?
​...

I can take pictures as soon as i am at my brothers house again (it´s his TV).
But it was just grey lit. With left cable from tcon to panel disconnected it was half ok, other half grey lit.


Thanks for this info, i will check it! Unfortunatelly no, i am not from albany.


thats what i feared. I will try tape fix after i measured the cap Davi mentioned.

Before i try the tape fix, is there any way to determine what pin is shorted (measurements with multimeter or oscilloscope)? Or even blow up the short with overcurrent so that is just a open...

Hi,

i want to repair a Sony KD-75XF9005 TV that initially only showed a grey picture.
Backlight seems to work, Sound (Setup menu after reset) works.
If i dissconnect the left FFC cable from TCON to panel i have half a screen on the right. If left cable is connected always only the grey screen.
Interchanged the cables, its always only the right side that is working. Always grey if left side is connected.
With my small knowledge i would think at least the cables are good.

Can this happen because of a bad tcon board?
Or is it always a bad/shorted...