Sharp LC-70LE757U flickering display

[budwich]

Re: Sharp LC-70LE757U flickering display

OK... you might want to start your own thread for an 80. But in the mean time, if I understand you right there are tab cable on both sides of the set like the 70's.
You are saying that there are no side boards but that the tab cables have to be interconnected some how and further, they have to be connected to the bottom boards somehow. You need to confirm this better. Of course, if you start your own 80 thread, freakaftr8 might spot it as he has worked on the 80 at least once... it had led issues if I recall.

[hmendez86]

Re: Sharp LC-70LE757U flickering display

[ATTACH]127683[/ATTACH]

[ATTACH]127684[/ATTACH]

[ATTACH]127685[/ATTACH]

[hmendez86]

Re: Sharp LC-70LE757U flickering display

I got a tv, but this is a 80 inch sharp. LC-80LE757U the driver it self does not have board like the 70 inch sharp...it is just a tab with driver only, it has 4 on each side of the panel how this work....am thinking that instead of adding a board there use drivers like jump one to another and connecting with the bottom tabs. I can see veins running from battom to the top drivers. I don't know if am right. ........??????need help in this one bit different as the 70 inch .......

[hmendez86]

Re: Sharp LC-70LE757U flickering display

Yes it had one line, it look like half screen from left to right like it bearly getting to the right, but it stop like half way of screen.the other black lines were the flickering it was doing. I already remove the tab bonding directly from the screen,it was though job to do, because of the side protective aluminium trim. Well any was it was fix I was like woow new tv. I wonder why ,but we'll it is go quality tv for to watch fifa games jeje......I got another 80 inch tv sharp LC-80LE757U ...the this is doing it has a line it is weird line it do like tranverse the picture it's thin and long from right to left and it is like half of the screen like if she wanted to get to the left, but she stoped at Half way horizontal....

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

hey, but is it true about removing the tab driver from the left side. i have the same problem as the other guy with their tv LC-70LE757.. i disconnected the left driver and the flickering stops, but the left side gets a darker image. so by removing it, it will be fix.

Yes. If that's the problem and by disconnecting it resolved the issue. This is only the case if there are no other issues causing the problems with the TV and by disconnecting the back left side cause you Tv to straighten out yes your picture will be darker on that side. Do you have any horizontal lines going across the screen?

[hmendez86]

Re: Sharp LC-70LE757U flickering display

Well technically these drivers there is a bank of drivers on one side of the screen and there is a bank of drivers on the other side both doing the same thing. The second side of drivers relieves the stress from the first side of the drivers running the horizontal axis. When one side fails it essentially loads down the opposite side of drivers thus putting stress on them twice as hard as one complete side removed. Since it seems that these panels are burning out one side of drivers there is no alternative fix to repairing the panel besides throwing it away. So this is a last resort Repair to a LCD panel that would be otherwise rendered useless. Until somebody comes up with a cheap alternative to a tab bond replacement unit for the masses, this is the only thing that seems to work. There must have been 20 or more Repair as of August of last year and I have not heard or seen any of them fail as of yet with this Repair. As I myself have two tvs now 1 Vizio and 1 sony both still working fine. Everything stays the same, refresh rate colors and brightness. The only drawback to this repair it is just a little bit harder on the opposite side of drivers that are still running the panel. But like I said I have not seen a single failure yet, not saying that it's going to not to happen because it very well could but this is least gives some life left into an otherwise useless television

hey, but is it true about removing the tab driver from the left side. i have the same problem as the other guy with their tv LC-70LE757.. i disconnected the left driver and the flickering stops, but the left side gets a darker image. so by removing it, it will be fix.

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

Well technically these drivers there is a bank of drivers on one side of the screen and there is a bank of drivers on the other side both doing the same thing. The second side of drivers relieves the stress from the first side of the drivers running the horizontal axis. When one side fails it essentially loads down the opposite side of drivers thus putting stress on them twice as hard as one complete side removed. Since it seems that these panels are burning out one side of drivers there is no alternative fix to repairing the panel besides throwing it away. So this is a last resort Repair to a LCD panel that would be otherwise rendered useless. Until somebody comes up with a cheap alternative to a tab bond replacement unit for the masses, this is the only thing that seems to work. There must have been 20 or more Repair as of August of last year and I have not heard or seen any of them fail as of yet with this Repair. As I myself have two tvs now 1 Vizio and 1 sony both still working fine. Everything stays the same, refresh rate colors and brightness. The only drawback to this repair it is just a little bit harder on the opposite side of drivers that are still running the panel. But like I said I have not seen a single failure yet, not saying that it's going to not to happen because it very well could but this is least gives some life left into an otherwise useless television

[hmendez86]

Re: Sharp LC-70LE757U flickering display

Nice! Here are pics of the left-side drivers removed and the TV working like new.

Watching Monday Night Football and it looks glorious!

but if you remove them? why still picture it suppose to control the left side. add pics were you removed them. i have the same problem tv is working good it doesn't turn off. after i read your comments i though i was a bad t_con i have try on other tvs with horizontals lines and it was of bad t-con and i went by that. i disconnected one side on the t-con LC-70LE757U an it works good and i reconnected and flickering started. so tell me more about whats the function of driver guide me a bit to fix this tv thanks......

[mmartell]

Re: Sharp LC-70LE757U flickering display

That doesn't look like MNF. Oh wait, the guy in the middle is Stafford so must be the Lions :/

[grizgza]

Re: Sharp LC-70LE757U flickering display

Nice! Here are pics of the left-side drivers removed and the TV working like new.

Watching Monday Night Football and it looks glorious!

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

Nice fix!! Wow 3 repairs in 1 day! Let's see the pic

[grizgza]

Re: Sharp LC-70LE757U flickering display

So I went ahead and removed the left side driver tabs from the lcd panel. And BOOOOOM it worked! Perfect picture across the screen.

I realize this is more of a salvage than a full repair, but I'm happy. The drivers on the other side will likely eventually go, maybe sooner than the last ones because they are doing double duty, but the set was given to me and any time I get out of it with our family I'll be happy!

Thanks for your help guys. Without your help and the other thread I would have never know to try this.

[budwich]

Re: Sharp LC-70LE757U flickering display

I think you are seeing a driver issue. On the sharp that I looked at, the tcon did make noise when the thing was running with a "bad side". When you disconnect one side or the other, you may not actually take out the driver from the load on the overall circuit but you are reducing the load on the tcon overall because it is only "pushing" to half the screen. But as freakaftr8 indicates, there is no going back once you go that way so for sure take your time on this.... plus its only TV... you can't be missing much.... :-)

I think you would be wise to get a hold of some test patterns... they are on various discs both as part of "extras" and as actual test discs (wow for instance). I think this will provide you with a better "image" of what you are looking at. Further a white screen is not a good screen to look at for this problem as I found the lines aren't "dead lines", they are some form of "delay" line across the screen (ie. shifted).

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

Man that's a tough call. Possibly if cheap enough try a tcon board but I still think it's a panel problem. It's your call.

[grizgza]

Re: Sharp LC-70LE757U flickering display

No horizontal (or other) lines at all. Picture looks fine, just dark on left side. Also, no buzzing from the t-con board like there is when the driver is plugged in.

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

Ok and when it is in that state with the driver disconnected like you showed in that picture can you display something on the screen other than a white screen and actually see an image and within the image are there any horizontal lines spanning horizontally across the screen?

[grizgza]

Re: Sharp LC-70LE757U flickering display

OK, I really appreciate your help.

I had previously disconnected the left side drivers ribbon cable at the bottom. The flickering and horizontal lines went away completely and the left side of the screen was darker.

http://imgur.com/unIHYDM

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

That's what we're trying to figure out before we decide to butcher the panel. We need to rule out the t-con board. The flickering you're getting on the screen almost looks like a driver is loading down the tcon board especially the core voltage to the main processor to the point where it wants to shut down with the 2- 5 error code but its not

[grizgza]

Re: Sharp LC-70LE757U flickering display

I'm now feeling fairly confident that the issue is isolated to the left half of the screen (cables on right side when looking at the back of the set). I'm thinking that removing the tab drivers on that side may fix the issue, but hesitant to go ahead and do this if it could be just a bad t-con board.

Is it likely that the buzzing sound on the t-con board and the screen flickering when one side is plugged in are caused by a short on the corresponding tab driver. Based on my evidence is there any chance that it is the t-con board itself that is the issue?

[freakaftr8]

Re: Sharp LC-70LE757U flickering display

I would say that looking at the front of the TV the left side driver tabs there is some sort of problem. Now if you can dig into this a little deeper can you pull the black side metal frame off the panel and very carefully disconnect the white cable going to that side? It is about three quarters in length and is connecting to the bottom of the left side side drivers? This is looking at the side of the panel on the left side of the TV facing the front. This cable is located on the left side near the bottom. It will look like this .

Once you do this power of the TV and see if the flickering persist. Most likely what you're going to see how is the left side is going to be darker then the right. But what I'm looking for is any horizontal lines going across the screen