E701i-E3 70" LED Horizontal Line

[Michale32086]

I am assuming that this is likely a panel/tab bond issue that can't be repaired..

As you can see in the pic, the line kinda fades away into nothing as it goes to the left...

I just wanted to make sure... I don't want to crack open this monster unless there is a chance it's fixable...

[budwich]

Re: E701i-E3 70" LED Horizontal Line

its the standard bad tab... which means that the set is "saveable", not fixable, by removing the side tabs... in this case, the right as looking at the set. If not done, eventually, the tab may take out the other side (which then is not saveable) or possibly over load the tcon, taking it out. Anyways, it is the "standard method" that freakaftr8 and other have done many times.

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

its the standard bad tab... which means that the set is "saveable", not fixable, by removing the side tabs... in this case, the right as looking at the set. If not done, eventually, the tab may take out the other side (which then is not saveable) or possibly over load the tcon, taking it out. Anyways, it is the "standard method" that freakaftr8 and other have done many times.

By "taking out" do you mean just slicing it off???

[budwich]

Re: E701i-E3 70" LED Horizontal Line

the tabs are usually removed by pulling them away from the panel... like a piece a tape. The reason for this is to ensure that no "residue" of the tab is left behind as it is possible that it may impact the underlying tracks / traces which might have caused the original problem. I would read up on the process / threads before doing anything if you aren't familiar with things. Overall, it is quite simple and in the majority of cases, successfully in bringing the display back to "normal" although because tabs on one side have been removed, there is some "limitation" (associated with refresh and such)... but overall, most do not notice much difference for general viewing.... certainly beats junking the tv.

The process IS NOT replaceable... meaning once the tabs are removed, you can't put them back... its a one way street and is basically the last resort for saving the set.

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

the tabs are usually removed by pulling them away from the panel... like a piece a tape. The reason for this is to ensure that no "residue" of the tab is left behind as it is possible that it may impact the underlying tracks / traces which might have caused the original problem. I would read up on the process / threads before doing anything if you aren't familiar with things. Overall, it is quite simple and in the majority of cases, successfully in bringing the display back to "normal" although because tabs on one side have been removed, there is some "limitation" (associated with refresh and such)... but overall, most do not notice much difference for general viewing.... certainly beats junking the tv.

The process IS NOT replaceable... meaning once the tabs are removed, you can't put them back... its a one way street and is basically the last resort for saving the set.

Awesome... I'll check it out.. Thanx...

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

OK I read up on it and I found an old 70" with a busted out screen and practiced...

First thing I noticed is you don't pull from the front going forward.. You pull from the back going back... That sound right??

And, should I pull ALL the tabs?? Or just the one that is offensive??

Thanx again..

[budwich]

Re: E701i-E3 70" LED Horizontal Line

you have to pull ALL the tabs on the side that is in trouble as they work "unison".
As for pulling... as I indicate, it is just like pulling tape off a surface so which ever way the tape is mounted (ones that I have seen are from the front), that's the way they are removed. Further, on the 70, the tabs aren't "isolated" like you have shown on that set (that set is more likely a 60 in). They are attached to edge boards which makes getting your fingers in there a bit more difficult. The board(s) are discarded as they are of no further use... other than maybe for scrap components (ie. smd capacitors/resistors).

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

OK Awesome.. Lemme clear a couple Sammys off the bench and I'll jump on it..

Thanx for the help..

I'll follow up as to success or not..

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

You'll straighten it out. Just look at the posts on this forum about Sharp/vizio 70 inch panels including mine and Budwich.

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Looks like I might have scrooed the pooch on this

Looks like this unit doesn't have tabs on the side but rather full-fledged PCBs..

I am assuming pealing them off is not an option??

Plus I futzed with them, just to see if maybe re-seating them might make the line go away...

Now I don't get ANYTHING on the panel.. Just a backlight..

I am thinking I might have fried the TCON.. I know how sensitive this particular model can be...

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

Yes on this particular panel there are PCB's attached to the ribbons you need to pull the whole thing off with the ribbons in the PCBs. But now you may have blown the small transistor on the tcon.

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Any way to confirm that with a voltmeter???

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

I have 5 of the TCON boards I ordered when I worked on this model in the past..

THAT time, it turned out to be LVDS cables..

Any way I can hook them up without the threat of frying them too??

[budwich]

Re: E701i-E3 70" LED Horizontal Line

you needed to read more threads on "operating on 70 in vizio" :-(

find the main thread that feakaft8 started... its over 80 pages long... :-)

As I mentioned, the side edge boards are connected to the panel via tabs. Your picture is looking at the "back side"... you will see the tabs on the front side once the bezel around the set is removed (or at least on the side you are interested in).

Further... the side edge boards are interconnected to the bottom edge board by "unclampable" ribbon cables at the corner of the frame. Unclamp the cable for the side in question. Of course, do this with the tv unpowered.

Power the set up and see if any thing happens. IF not, as freakaftr8 mentioned, you likely took out the fet on the tcon (its fixable / replaceable... again in the same thread).
Since, you have another tcon, use it instead...since you have unplugged the trouble side which you had seen the picture for and confirmed it was the bad side. You should have no problems getting a picture again.

Others with this type of set usually have no picture to confirm which side is bad and hence have to "gamble" by usually burning out the fet on the tcon when they disconnect the WRONG side and leave the bad side connected. NOT your case.

Anyways, unless you do some more monkeying around in areas where you shouldn't, you should be able to get a picture back. Once you do. Power the set off / disconnect the power, and pull the tabs on that side. Once done, power the set back up and watch the picture.

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

Sense it appears that the right side is the issue I would just strip those ribbons with the boards right off the screen and then power up with a new T con and I guarantee you a problem will be solved

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

OK Update... I got the right tabs/pcbs off, but am now getting a scrambled screen.. I tried replacing the fet on the original TCON board but probably just FUBAR'ed the TCON..

I have one on order.. SHould be here Weds and will update the thread..

Thanx to Freakaftr8 and budwich for the assists...

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

Odd can you post a picture of the screen in its present state? Also I noticed you mentioned you have 5 other tcon boards what happens if you try any of those?

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Odd can you post a picture of the screen in its present state? Also I noticed you mentioned you have 5 other tcon boards what happens if you try any of those?

It'll have to be early tomorrow morning.. Probably around 0300 EDT....

A couple of the TCON boards gave me a display but it was frazzled and fritzy, if that makes any sense..

The other 3 just gave me a backlight with nothing on the display..

I took the FET off of one that had a frazzled/fritzy display and put it on the original TCON, but my soldering was likely off and I likely fried something..

I'll get some pics of what the display looks like now in the morning.. Hopefully I didn't torch the whole unit..

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

Ok cool

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

OK, the pictures aren't the best.. I had to hold up the TV with one hand and take the pictures with the other..