sharp lc-70le747kn do i cut panel driver ribbons off ?

[daz2206]

ive had this tv for a while and read up on here about the side panel drivers causing similar problems (hoping freakaftr8 can shed some light on it)
person i got it from said screen went all funny then it would wouldnt turn on at all and just kept blinking fault code (cant remember off the top of my head but think it was 2 flashes) anyway i disconected the side driver ribbon and the tv works but only as in the picture with VERTICAL thick bands, all the tv@s on here with same fault seem to be horizontal bands so should i cut the drivers off the bad side ? (if i remember right the half white screen was when i disconnected the tcon cable on the bad side) tv has been sat on the bench for months like this so thought its time to get it looked at to get my bench back

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

That is an interesting a fault however I would be thinking more along the lines that you have a vertical gate IC failure. The vertical gate is dragging down the horizontal drivers on that side. Disconnecting the horizontal drivers allow the vertical gates to work so you can see what's going on here.

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

What happens if you disconnect the horizontal driver ribbon on the bottom corner of the other side

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

I would make sure that the ribbon going from tcon to panel is clean and doesn't I have any damage first. That almost looks like a bad connection on the ribbon connection.

[daz2206]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

Sorry i cant remember what happened disconnecting the other side (i did try it though) il try it tomorrow and let you know as im out for the night tonight, and thank you for your help

[budwich]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

you need to wear your glasses when checking/reseating the tcon to panel cables on that side of the screen :-) of course you are checking the cable at the tcon BUT also at the bottom edge board of panel.

[daz2206]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?


Ok just tested the tv again, with everything connected the tv wont turn on and i get 2 flashes from the standby light, with either side panel drivers disconnected from bottom or middle i get the the exact same bad picture. Ive checked tcon ribbons both ends and all seems fine. On a test picture ive noticed (after feeling sick thinking the screen was cracked because of the daft test picture) the far right maybe 1/6th is always black so assuming that is something to do with the problem

[daz2206]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

the last pic with the white half is with tcon to panel cable disconnected
ive got no idea why they are upside down as they show normal on my pc

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

This is a very strange fault indeed a. I do not believe you have horizontal driver failure. It looks as if the vertical gate driver at the bottom of the panel where the lines are located failed.

Also could you try swapping ribbon cables between the right side and the left side see if the issue carries over to the other side

[daz2206]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

This is a very strange fault indeed a. I do not believe you have horizontal driver failure. It looks as if the vertical gate driver at the bottom of the panel where the lines are located failed.

Also could you try swapping ribbon cables between the right side and the left side see if the issue carries over to the other side

i did try swapping the tcon to screen cables over and still exactly the same
all this vertical gate stuff is way beyond me haha is it worth trying to source a tcon or would that not help ? there seems to be a few tcons on usa ebay but nothing on our uk ebay

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

, Try applying a little heat to the tcon processor and watch the panel

[budwich]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

:-( forget the heat. It ain't your problem. As you noted, when you have disconnected the tcon to panel cable, the side that is disconnected goes white. As you noted also, that you have a black bar on the far right. It is very likely that means that area is "voltized" since its not white. If you look at the tab bond on that side probably near or at the end of the edge board, you will likely find your answer and it won't be good. :-(

[Critter202033]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

Sorry but I have this same problem, took off the tabs on the side as is mentioned in the other post of your neighbour's TV budwich. (Thanks so much for that from both you and freakaftr8). Now the image is back to normal and beautiful... Except for that same black line that the op is having. What is the edge board and are you supposing that there's no fix for this (ie can't be the Tcon). I have the same model as your neighbor and mine goes white just like the ops when I pull the second cable from the left. I'm really hoping something can be done! Thanks!

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

Sorry but I have this same problem, took off the tabs on the side as is mentioned in the other post of your neighbour's TV budwich. (Thanks so much for that from both you and freakaftr8). Now the image is back to normal and beautiful... Except for that same black line that the op is having. What is the edge board and are you supposing that there's no fix for this (ie can't be the Tcon). I have the same model as your neighbor and mine goes white just like the ops when I pull the second cable from the left. I'm really hoping something can be done! Thanks



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Are these pictures after your repair??

[Critter202033]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

No, these pictures are prior, the image is beautiful now minus that same black bar at the right of the screen. Is there a way to know if it's the Tcon or just gotta bite the dust, pick one up and see what happens?
Thanks!

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

You might wanna go back and check where you peeled the tabs off there might be a small piece still hanging on or rub your finger across the area of concern. Tcon Has no control over horizontal driving of the panel

[Critter202033]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

Thanks, I'll check it out, don't know if it makes a difference but it was happening before too. I'll keep you posted after I've checked. I know there's still a little piece or two but right where it connects so I'm not really sure how to get it off, could those be causing it you think, and just to clarify it's a vertical line not horizontal.

[freakaftr8]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

OK if it's a vertical line I had seen this before in a 70" Sony that uses a sharp LCD panel as well. Vertical lines are most likely not repairable as this controls from the vertical gate drivers. This is an unrelated issue to the horizontal drivers.

[Critter202033]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

Ok, I was really hoping that it might've been the Tcon since it goes white when one of the cables are disconnected. Oh well. I'll post a picture later today where you can see the black just to be sure we're talking about the same thing, noticed the picture I posted you can't really see the black.

[budwich]

Re: sharp lc-70le747kn do i cut panel driver ribbons off ?

its the tab in the bottom corner of the panel, not the side.