Vizio E70u-D3

[budwich]

Re: Vizio E70u-D3

Its time consuming in terms of getting access. The actual "operation" of isolating which side has a problem is relatively quick assuming the tcon card is functional as the problem does take out the card which then needs to be repaired.

Depending on how "active" the repair shop is (in the "know" / "on-line grazing"), you might get by with a 2-3 hour charge plus parts (if necessary to fix the card). They may "balk" on doing anything other than say its a "panel problem" if they haven't done one before. They may indicate that they won't "guarantee" the attempt.

If you have the space to get at the set and some help manipulating it, it readily doable by most "rocket scientists"... :-)

[Jagkh]

Re: Vizio E70u-D3

My boss gave me one of these tvs for free the other day because they were replacing them and im pretty sure this is what is wrong with it. It would make sense that the phosphorus would burn out because it has been used for for 2 years straight for 12 to 16 hours a day. I have never attempted any kind of tv repair and im not sure if i should but how much do you think it would cost to get this problem fixed by a pro?

[Michale32086]

Re: Vizio E70u-D3

well the "hail mary" is to remove that tabs along the side that is in trouble for other parts that are trying to drive the panel. NOTE this is the LAST RESORT as there is no way to put them back.

BUT first, let's make sure you understand what a "tab" is. It is the thin brown tape going to the panel and is stuck to the panel. I say this because you appear to be using the word "tab" quite alot when referring to cables which are "clampable"... those are NOT tabs.

Anyways, based on the pictures that you have posted, the tabs of interest are along the left side of the panel (looking at the front). There is probably 5-6 tabs if there are no side edge boards. Those tabs are similar to the "u" cables that you unclamped between the bottom edge boards... but these tabs only run from the panel to the panel interconnecting tracks on the panel itself. Hope this gets you further. They are located on the side and NOT the bottom of the panel.

What he said ^^^^

[budwich]

Re: Vizio E70u-D3

well the "hail mary" is to remove that tabs along the side that is in trouble for other parts that are trying to drive the panel. NOTE this is the LAST RESORT as there is no way to put them back.

BUT first, let's make sure you understand what a "tab" is. It is the thin brown tape going to the panel and is stuck to the panel. I say this because you appear to be using the word "tab" quite alot when referring to cables which are "clampable"... those are NOT tabs.

Anyways, based on the pictures that you have posted, the tabs of interest are along the left side of the panel (looking at the front). There is probably 5-6 tabs if there are no side edge boards. Those tabs are similar to the "u" cables that you unclamped between the bottom edge boards... but these tabs only run from the panel to the panel interconnecting tracks on the panel itself. Hope this gets you further. They are located on the side and NOT the bottom of the panel.

[Michale32086]

Re: Vizio E70u-D3

Likewise.

BTW, it does look like the problem seems to be most obviously the two top left tabs. One of them has an extremely hot IC. What happens if I pull the tabs off?

While unlikely, it's POSSIBLE (ever so slightly) it may improve your issues..

At this point, there ain't much to lose, eh?

[darkfinger]

Re: Vizio E70u-D3

It was a pleasure working with ya...

Likewise.

BTW, it does look like the problem seems to be most obviously the two top left tabs. One of them has an extremely hot IC. What happens if I pull the tabs off?

[Michale32086]

Re: Vizio E70u-D3

Yeah, I don't do this for a living. I've repaired a few for family and friends but I obviously don't have a clue what I'm doing. I appreciate the support you've provided!

Glad to help.. I get so much help from everyone here with very little opportunity to give back.. It's a thrill and a half for me to actually be able to give credible assistance.. I am a pygmy amongst giants here but it's nice to have relevant experience now and again..

And don't sell yerself short.. You are far from clueless. Even ATTEMPTING such an undertaking is a huge leap forward..

I remember when I started I was PETRIFIED of taking even the simplest of electrical/voltage reading.. Now I am flitting around Plasma voltages left and right.. And I would always write off LED/LCD problems as un-fixable... So yer way ahead of the curve in that regard...

As I mentioned, the fact that you were able to take such a large panel off and get it back on without a crack?? On yer first try!? Phenomenal!!

I did replace the tcon today and as you expected it didn't make any difference. I do think it's the tabs on the sides that I messed up. Is there any final step you might suggest before I pack it all up for the recycler?

Well, if yer not a regular at this, scavenge the components and sell them on EBAY... You learn a lot about TV disassembly and the relationship of parts to one another and make a few bucks ta boot..

It was a pleasure working with ya...

[darkfinger]

Re: Vizio E70u-D3

Yeah, I don't do this for a living. I've repaired a few for family and friends but I obviously don't have a clue what I'm doing. I appreciate the support you've provided!

I did replace the tcon today and as you expected it didn't make any difference. I do think it's the tabs on the sides that I messed up. Is there any final step you might suggest before I pack it all up for the recycler?

[Michale32086]

Re: Vizio E70u-D3

Most likely!

Yea, that would be my guess as well.. It's a tricky procedure and, at the risk of sounding condescending, you can take SOME comfort in knowing you can do an LED replacement without cracking the screen..

I am not sure if you do this for a living or if this was just a one off for personal "consumption" (so to speak)...

If you do it for a living then every project is a learning experience, even the failed ones.. Actually, ESPECIALLY the failed ones...

I don't mean to sound blase' about it. Believe me I have been there more times than I want to count..

Wish it had gone better for ya...

[budm]

Re: Vizio E70u-D3

Please disregard my response, I post it in the wrong thread.

[darkfinger]

Re: Vizio E70u-D3

Very small LED's!

Not entirely sure what you mean...

[darkfinger]

Re: Vizio E70u-D3

I think you might have "over handled" the panel when it wasn't framed and it resulted in issues with the various tab bonds around the panel... :-(

Most likely!

[budwich]

Re: Vizio E70u-D3

I think you might have "over handled" the panel when it wasn't framed and it resulted in issues with the various tab bonds around the panel... :-(

[budm]

Re: Vizio E70u-D3

Very small LED's!

[darkfinger]

Re: Vizio E70u-D3

I received a replacement TCON board yesterday and I'm going to try it tonight. Based on what you've both told me I'm not expecting this to be the issue at all but I might as well check.

My thinking is it's likely to be the tabs on the left and right sides of the panel rather than the bottom tabs to the driver boards. I was extremely careful with the panel reassembly but I did misunderstand the way the panel layers went together. I placed the panel directly on top of the diffuser and then tried to put the panel frame around the panel. The bottom edge of the panel rested on the bottom frame while the sides and top were on the diffuser. I tried quite hard to put the left and right sides of the frame on before I realized my mistake that the top, left and right frame sides needed to go on first and have the panel rest on it. Given the amount of pressure I applied to try to get the frame to fit I probably pushed down on the tabs on the left and right sides.

The tabs don't look physically damaged but I should inspect them more closely. However, when the TV is powered and I wiggle some of the tabs the display does change (and, at one point caused the TV to "power cycle").

So, the bad news is that I might be screwed but I do think it's likely the bottom tabs are ok.

Thanks for all your advice.
Dave

[budwich]

Re: Vizio E70u-D3

you may want to double check the "unclampable" cables on those boards (ie. they go towards the tcon) to ensure that they are indeed aligned properly. The vertical lines do not look good and might be caused by those cables not being connected properly. IF you are ambitious you can try swapping the two cables from the other side and see if that changes anything (note: swap as in unplug BOTH ends and move the cables and opposed to "crossing" which won't work and will cause damage).

[darkfinger]

Re: Vizio E70u-D3

Here you go (and, thanks!)

[Michale32086]

Re: Vizio E70u-D3

Now we have a REAL expert here..

I noticed something on one of the pics..

Can you post a close up of the area I marked??

[darkfinger]

Re: Vizio E70u-D3

Sorry I was confusing. These pictures are not really examples of the horizontal lines. I referred earlier to stuff I was seeing when I was only disconnecting the cables from tcon. In that case the thin boards were all connected. I got different results for each of the four cables. What I was referring to was that in a situation where pat of the panel worked and showed a decent picture there were horizontal lines. Those lines weren’t dark they actually showed a fainter version of the picture.

[budwich]

Re: Vizio E70u-D3

not sure if we are talking the same "language"... :-) you indicate earlier that you are seeing horizontal lines but in your picture I see only vertical lines.... some one is looking "cross eyed"... :-) but maybe the first one shows some horizontal lines... hard tell with the angle and not knowing what the actual display is supposed to be.

Anyways, IF your set has no edge boards along the sides, then the last tab on the bottom corner is responsible for providing signal (and stuff) to both the vertical portion of the screen (for that section) along with signals that go "thru" the panel up to the tabs along the side.

Your 2nd picture is kind of telling that there is a problem on the other side... as by disconnecting the 3/4 board, no signal is getting up to that side and the tv is relying on the signal going up the other side... BUT as you see nothing is happening.... because the other side has a problem.

The 3rd picture is somewhat telling that there might also be problems on the bottom on the side with the vertical colors.... is that the same vertical area that is showing no display in the first picture? Those might be an issue as the bottom tabs must remain in place. You might want to check the edge boards to see if any SMD components have failed (caps or resistors).... but I fear that this set is not salvageable because you have problems in both the bottom and sides.... but maybe I am not seeing things correctly.