Last chance Bravia. blank or white screen KDL-60EX645

[PlayDoh]

Re: Last chance Bravia. blank or white screen KDL-60EX645

On YD I get 12v on both sides, that tells me it’s not open/blown. Is that incorrect? 1R0 is 0.25v on both sides. YD and 1R0 both reading 0.4 ohms.

I did diode tests on that transistor awhile ago, and just now. I was following a YouTube video on testing the T-con. I think the single post is called gate. With the side with the single post up and using diode function I get 1480 or 280 between top and bottom left. Switching polarity of probes gives different readings.
From bottom left to right is 300 either way.
Bottom right to top is 1060 or 360.
Since I can swap out every part but the panel, I can’t see how it’s anything but the panel at this time. I had to take the panel out twice, and while I was very careful, there not made to be removed obviously.
I can’t give up on it until I can confirm it’s the panel, or just snap and throw it through a wall. Not sure which is more likely.

[freakaftr8]

Re: Last chance Bravia. blank or white screen KDL-60EX645

Im about to snap on my XBR75X850C.. I have dreams of taking a mallot to the screen.... No TCON voltage , but has 12v coming in, been through 5. Everything points to TCON though... Even with panel disconnected...

On yours on some of those inductor coils, you shopuld be reading voltages around 28v or so. If not, tcon cant fire up the panel correctly if HVDD missing.

[PlayDoh]

Re: Last chance Bravia. blank or white screen KDL-60EX645

Most of the outputs from the main/logic board to the T-Con are from 1.2 to 1.4v. I would expect around 6v each, and very consistent. This is with the T-con cables disconnected. there are 4 or so 12v pins, and power board is giving 12v to T-Con VCC, and 3.2 to T-con on.
And this is the same with 2 identical Logic boards.

Is it possible that a panel short could damage the logic board and cause it to underpower the T-con? Even when the T-con is disconnected?

[PlayDoh]

Re: Last chance Bravia. blank or white screen KDL-60EX645

https://youtu.be/yTnkOfwBGGE

Panel is shot, to the pit it goes.

[freakaftr8]

Re: Last chance Bravia. blank or white screen KDL-60EX645

Before you do that you could at least rip off the side tab gate drivers and see if it straightens it out one side at a time.

[freakaftr8]

Re: Last chance Bravia. blank or white screen KDL-60EX645

It's always worth buying a another tcon just for shit's and gigs and connect one side at a time the 1st side use your judgment

[PlayDoh]

Re: Last chance Bravia. blank or white screen KDL-60EX645

Plz don’t tempt me, lol. It’s such a shame to toss it. I have the buffer boards and tabs from the other TV and I’ve been wondering if and how I could swap them. Yet I can’t see how there could be a short. Ugh I’m gonna have to smash it so I can let go. I have repair OCD, to the point I fix things just for the sake of fixing them. Well beyond practical.