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?...
darkfinger
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Last Activity: 09-14-2018, 12:59 PM
Joined: 01-24-2011
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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?Leave a comment:
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Re: Vizio E70u-D3
Not entirely sure what you mean......Leave a comment:
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Re: Vizio E70u-D3
Most likely!...Leave a comment:
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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...Last edited by darkfinger; 09-10-2018, 03:59 PM.Leave a comment:
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Re: Vizio E70u-D3
Here you go (and, thanks!)...Leave a comment:
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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.Leave a comment:
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Re: Vizio E70u-D3
Hi Budwich,
There are no cables in the bottom corners and no side edge boards, only 8 little tabs on each side that stick out about 1/3".
There are 4 boards along the bottom. Depending on which ones are connected to each other I get different effects, shown in the attachments. First one is boards 1 and 2 disconnected, second is boards 3 and 4 disconnected, third is both 1 and 2 and 3 and 4 disconnected.
Thanks,
Dave...Leave a comment:
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Re: Vizio E70u-D3
Thanks for your suggestions!
I've examined the tabs carefully, looking on both sides, with my magnified headset. I can't seen anything that looks suspicious. There aren't any areas that even look strained or sharply bent. I'm puzzled.
There are four long thin boards that hang from the tabs. The inner two are connected to tcon and the outer two are connected via a small cable to the inners. I found that with everything connected the TV reboots, but if I disconnect a single cable (any of the tcon cables or even one of the board-to board...Leave a comment:
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Re: Vizio E70u-D3
Interesting! I did what you suggested, and found that if I unplugged one of the tabs then the TV would partially work, and not reboot constantly like before. The right side of the panel showed a picture which looked pretty good although there were a few horizontal lines through it. The left side was light grey but no picture.
What is strange is that I thought I'd got the problem isolated to that tab. But when I tried moving the tabs onto different connectors the results were inconsistent. For example, swapping the "working" tabs between...Last edited by darkfinger; 09-02-2018, 01:07 PM.Leave a comment:
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Re: Vizio E70u-D3
Thanks for all your advice. I will look at the tabs etc today. Regarding tracking down the problem by disconnecting one tab at a time, is this because one "failing" tab would stop the panel working?Leave a comment:
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Re: Vizio E70u-D3
These connectors?...Leave a comment:
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Re: Vizio E70u-D3
Yes, the TV worked fine just super blue tint, prior to my fix.
I've disconnected and reseated all the cables. No change.
I will order new main and TCON boards. Might as well. I feel dumb but confused as to how I could have killed a board. Perhaps static shock?Leave a comment:
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Re: Vizio E70u-D3
Well, I very carefully replaced the bad backlights and put everything back together without a hitch. Felt very good about it, except when I powered the TV back up it doesn't work! The backlight comes on but the screen only flickers - there's no Vizio logo or anything on the screen and no sound. It also appears to reboot itself every minute or so. Bummer. I can't think what I did and there's no visible cable loose or anything. Not sure what to do next.Leave a comment:
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Re: Vizio E70u-D3
Ugh I feel your pain. Thanks for your advice and I hope to be successful. Will post back one way or another.Leave a comment:
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Re: Vizio E70u-D3
Thanks. I bought those exact cups from HF! I was planning on lifting the screen from the TV and reversing that on reassembly. I've replaced backlights on a few TVs but nothing bigger than 50". When you cracked the screen did you place the metal back down onto the panel? (and, sorry if I'm bringing back stuff you'd rather forget!)Leave a comment:
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Re: Vizio E70u-D3
Hi,
I've got this exact problem with the same TV and about to go through a replacement of the LEDs. How did you crack the screen? I'm hoping to learn from you and avoid doing the same!
Thanks in advance
DaveLeave a comment:
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Re: Subwoofer Power Supply Problem
Hi there,
Thanks to this forum, I just ordered some caps from Digikey for my humming Onix. They were all Nichicon PW caps:
2x 493-1832-ND CAP 1000UF 25V ELECT PW RADIAL
2x 493-1775-ND CAP 47UF 16V ELECT PW RADIAL
2x 493-1786-ND CAP 470UF 16V ELECT PW RADIAL
Provided I don't screw up this installation, this'll be $3 well spent
Hope this helps,
DaveLeave a comment:
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