Sony kdl46s4100 half a picture

[tomstr]

Hello just had a quick question.my sony lcd has a problem..when i first turned it on the picture was slow to respond lower right screen.then the picture whould roll.few lines but not all the way across the screen.so i tried to trouble shoot the problem..then i turned the tv on again then i had backlights and sound but know picture..so i removed the left rear tcon board ribbon then my right side was white and have a pic on the left..so i thought i was the panel...so i removed the cord to the tcon and moved it around..then i got a whole picture .but the picture was rolling and the same as before..so im thinking it needs a tcon???anyone have any suggestions? ??you guys are smart..you have helped me in the past..and i thank you....

[Glitcher]

Re: Sony kdl46s4100 half a picture

does sound like the typical tab bond problems. And this model is known for that problem also.

[tomstr]

Re: Sony kdl46s4100 half a picture

Well i thought so but look at the picture?i also removed the front trim and checked the tabs on the panel but cant find a bad one..also the only way to get the picture whole like you see in the pic is too manipulate the tcon plug not the ribbon...and the tcon is making noise in tandem. With the picture disturbances. ..

[tomstr]

Re: Sony kdl46s4100 half a picture

Also im hearing a buzz from my power supply transformers..so i checked my 12v going to my mainboard and its at 11.5v just thought to let you know.

[capkid]

Re: Sony kdl46s4100 half a picture

You could try cleaning the t-con connectors with electronic contact cleaner. This TV is also known for main board issues, but that might be a far-fetched diagnosis at this point. It's still something to keep in mind.

[tomstr]

Re: Sony kdl46s4100 half a picture

Yes your right..i cleaned the plug to the tcon..looked at the pins also..just thinking it may be the tcon..if you just play with that plug then you get the image you see in the picture..mabe power supply or main?hell i dont know for sure??

[tom66]

Re: Sony kdl46s4100 half a picture

I am thinking panel more likely, possibly you are flexing the frame when you fiddle with the T-con?

[tomstr]

Re: Sony kdl46s4100 half a picture

now I'm not flexing the panel..i thought it was panel related..but if you wiggle it and the panel was out you whould get nothing?when you plug the cable in sometimes it stays and other time it shows nothing..so is it voltage being too low from the power supply causing the left side of tcon to act up ??or tcon failure??or main board issue? ?but when you move the plug and the picture comes back allthough looking like that..but working somewha. .bad connection or cable..but who knows . I CAN TAKE VOLTAGES IF ANYONE IS INTERESTED?

[tom66]

Re: Sony kdl46s4100 half a picture

T-con boards rarely discriminate between the LHS & RHS of a picture in that manner (that leads to a fading between the sides.) That can only occur due to some signal not reaching the panel, due possibly to a bad T-con, ribbon cable, tab bonding or bad driver IC on panel.

[tomstr]

Re: Sony kdl46s4100 half a picture

Thanks for your response..but i think you went over my head..but im guessing your ruling out the power supply?can you explane again im sorry but thanks for answering me...

[tomstr]

Re: Sony kdl46s4100 half a picture

Sorry i think i understand i read it again..left hand side and right hand side..man daa my fault..

[tom66]

Re: Sony kdl46s4100 half a picture

I am ruling out power board & main board, your choice if you want to chance a t-con, personally I don't think it'll fix it.

[tomstr]

Re: Sony kdl46s4100 half a picture

I agree with you..what stumps me is the tcon makes noise.as the picture is flickering..i thought that proved the tcon was acting up going out..

[tom66]

Re: Sony kdl46s4100 half a picture

I have had t-cons make noise from a bad panel before.

[tomstr]

Re: Sony kdl46s4100 half a picture

You know when your right your right..i just didnt want to just throw the tv away..so i will gut it out..

[tomstr]

Re: Sony kdl46s4100 half a picture

Tab problem simi fixed...

[Shinju]

Re: Sony kdl46s4100 half a picture

Bummer, I have this exact model sitting here dead in the water, power led lights up when plugged in but when you go to turn it on.... Nothing.

My guess would be PS or MB for mine, the person I got it from said it was working great one day and the next it wouldn't turn on!

Are you parting this out or going to try and tab bond fix it?

[tomstr]

Re: Sony kdl46s4100 half a picture

Well its a tab bond fix..so far does your tev have any back lights?

[AllGo'N'Show]

Re: Sony kdl46s4100 half a picture

hey tomstr, how did you end up with the final fix?? Your last picture looks like its pretty much there!

I just picked this one up, looks to be green/blue pixelated, searched but couldn't find anything, yours seems much worse than mine so any pointers appreciated! Just got it in from the cold and found the service manual, hope to start on it tomorrow and dig in.

[freakaftr8]

Re: Sony kdl46s4100 half a picture

Allgo, yours looks more like a mainboard or tcon problem.