problem Sony KDL46S4100 46 inch lcd tcon

[dean007]

hello hope everyone is having a good year so far probably wont last much longer lol
i have a sony 46 lcd tv Sony_KDL46S4100
it was having problems the screen went all bleached white the picture was clear just bleached white and all rainbow color looking weird
so i ordered a tcon board from arizona installed it and ended up with just completely black screen i ordered a bad board okay i order another from shopjimy
get that install it everything goes okay turn it on and fixed TV great
then i notice a single line going from top to bottom vertically about 3 inches from the center to the left side acting weird

its just one pixel width thick vertically from top to bottom and seems odd 2-3 inches up its fine then 2-3 inches it isnt then 2-3 it is on and off thru all the different inputs over air , video ,composite ,hdmi

its always just the one line everything else seems okay it doesnt seem to affect the on screen displays overlays

so i guess my question is do i have another bad tcon board or is the screen toasted

does anyone know is that how some tcon fail just one bad line

its been 2-3 months now of trying to fix it do i give up and live with the one line burnt out or try another tcon board
thanks for any responses

[Andrew F. Ali]

Re: problem Sony KDL46S4100 46 inch lcd tcon

If the one pixel wide line is not a bother to the rest of the picture and you don't want to give this one to a friend and buy anew TV. Decide for yourself what you should do. However try cleaning the flat cables from the T-CON to screen with IPA and see if that helps. Could very well be a spec if dust causing your problem.........

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

i did try looking at the connectors closely and wipe them off and tried several different times it might still be the connectors but i even tried moving them while it was on to see if it would change at all it didnt seem to

uuugghhhh
any idea do tcons behave that way i still have time to exchange the part for another just not sure anything is going to change worth the hassle to ship it back and forth

dam 10 dollar a pound shipping in canada

[budwich]

Re: problem Sony KDL46S4100 46 inch lcd tcon

unplug the tcon to panel cable on the side with the line (with power OFF). power the set back up. what happens to the screen on that side, what happens with the line?

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

okay i did that unplugged the top right flat cable from the tcon
powered on it came on the right side is still working fine the left side that i unplugged turned all white with a little black on the outer left side

the area that had the weird acting vertical line is gone and is just pure white with odd horizontal lines
that not working vertical line seems to light up continually and solid white so white is okay i guess

it didnt seem to affect the onscreen display in that 8-10 inch segment at the top where the menu is before i unplugged and did this test but i could see that line acting up when the menu was displayed just not in the menu area

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

it doesnt do it on the menu and white all lights up so maybe i got a crappy tcon replacement board ???
kinda seems odd that the tcon would maybe be working 99.5 percent so close you would think if it was bad or failing it would do something more spectacular

it definitely just diss appears some times like 50 percent of the time

that ribbon cable flat cable looks kinda beat up that attaches to the tcon
maybe the cable is bad it looks like it is only a couple inches long maybe i could try replacing that little 2 inch 100 wire flat cable
any idea what they call that wire or were i might find one at least its probably a cheap wire
thanks for the help

[budwich]

Re: problem Sony KDL46S4100 46 inch lcd tcon

repeat the "test" by unplugging the equivalent cable on the other side. What happens?

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

okay did that plugged the right one back in to tcon unlpugged the left powered on
left side works okay that one line is still not lighting right when the screen is black its not noticeable but then when source plays its there again

right hand side is mostly bright white with some darkening black tint on the far right

[budwich]

Re: problem Sony KDL46S4100 46 inch lcd tcon

OK... so the unplugged side basically looked the same on either side. That kind of says that the lower drivers / edge boards are ok, in general (to me). As Andrew suggested you may not get success. :-(
Still more checks. With all cables connected and powered up, locate the panel tab that seems to correspond to the line in question (ie. proximity).... using your finger or pencil with eraser, light press on the tab near the glass / contact area and see if anything changes with respect to the line. Be careful as the tabs are only "thermally glued" down and the contact area is very fine. Go from there.

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

so then you think the tcon is okay then

sucks the first one i got didnt work now i have 0 zero tcon faith lol

yeah when i did the tcon test thing it acted the same when i did either side basically 90percent solid white with some darker blackness on the outer edges

[budwich]

Re: problem Sony KDL46S4100 46 inch lcd tcon

"so then you think the tcon is okay"... I didn't say that. It could still be a problem but I think a singular vertical line usually isn't a tcon issue as I don't believe it can make that happen... but maybe.

The greatest potential might be a poor connection. Further, when you say "i did try looking at the connectors closely and wipe them off"... which connectors are you talking about? NOTE: a "cable" has TWO ends... :-)

can you post a picture, focusing on the connections / connectors in question?

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

i just cleaned the two white ribbon connection cables coming into the top of the tcon thats all i did not undo the other end of the cables going into the i believe h1 board under the top power volume controls

i think i would have to take the tv completely apart to get to the other end of the ribbon cable i can see the connector but i cant tell how it opens

[budwich]

Re: problem Sony KDL46S4100 46 inch lcd tcon

No problem, I don't actually know how they are terminated at the "other end" BUT from my limited experience, IF they are unclampable, it is possible that there may be a slight issue there for what ever reason. Yes I know from my sony 46 experience, you have to take a few things off to look / get at the other end.
Anyways, you likely have to go in that direction IF you want to check the tab areas to see if there is any impact on the issue by touching / pressing on them.

I am somewhat "unsure" of your "solid white with some dark blackness" observation... hmmm. can you post a picture of this?

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

when i unplugged the tcon the half i unplugged turned completely white in the center then as it went out to the edges the last 2-3 inches where darker black and kinda wavy like a picture frame just distortion i assume

it seemed to react the same way when i did either side

im just debating if its worth continuing to try and fix it more

i looked up or tried to find the little 2 inch ribbon flat cable i could only find one with a close part number but not the actual part on ebay guy wanted 16 for the 2 inch cable and then 21 dollars for shipping and in the add mentioned it has to be the exact right part

and the net had like no matches for the exact part so i guess i just suck it up and enjoy 99 percent of the tv once a person is back 5-10 feet from it it will probably not be noticeable by anyone but me

and ill just stare at it constantly remembering how i failed hahaha
just sucks if its the dam tcon and i could get anotherone shipped out and have a perfect tv again
maybe i should just leave it on for couple days straight and see if it acts up more

[budwich]

Re: problem Sony KDL46S4100 46 inch lcd tcon

well, your experience with tcons hasn't been good so far and I for one have never replaced one so I can't say much else.

I would suggest posting a picture of what you are looking at... if you can choose a test pattern that people know and can readily see issues with if there is a problem.

I guess if the "tcon supplier" has no problems sending you a replacement, then you have nothing to lose with getting another one but I doubt it will help.

[Davi.p]

Re: problem Sony KDL46S4100 46 inch lcd tcon

Hi, sorry i don't have read all the last posts, it's ery heavy for my engish, no punctuation..
I don't figure out well the defect, please can you post a pair of pictures, magnified, with and without the menu in the middle of defect, but i think is a matter of mainboard, maybe some metallic particle have finished under it by error.. or a smd capacitor have flewt away..

[dean007]

Re: problem Sony KDL46S4100 46 inch lcd tcon

i would take a picture but im not really sure its going to even show up in the picture its just one single pixel width about 3 inches off center on the left half and goes from top to bottom of the screen it doesnt do weird stuff just doesn't seem to be able to make all the colors seems it can do white and black okay and gray the menu color

unless someone knows about tcon failures and figures thats what it is
i could try another tcon

but taking the tv apart even further doesnt seen to be worth it
those flat ribbon cables and connectors really dont like being messed with they made that stuff cheap as crap 2-3 in and outs and your gonna have problems

the connectors start lifting from the wires there hard to line up and if you break one good luck finding the right part ever
i looked up just a little 2 inch flat wire and guy wanted 35dollars total

sometimes you gotta know when to fold em i guess im going to have to live with 99.23765521 percent of the tv working

[Davi.p]

Re: problem Sony KDL46S4100 46 inch lcd tcon

So the pictures?

[nomoresonys]

Re: problem Sony KDL46S4100 46 inch lcd tcon

OK... so the unplugged side basically looked the same on either side. That kind of says that the lower drivers / edge boards are ok, in general (to me). As Andrew suggested you may not get success. :-(
Still more checks. With all cables connected and powered up, locate the panel tab that seems to correspond to the line in question (ie. proximity).... using your finger or pencil with eraser, light press on the tab near the glass / contact area and see if anything changes with respect to the line. Be careful as the tabs are only "thermally glued" down and the contact area is very fine. Go from there.

So did you try this? it's to help see if it's a tab bond issue.