e701i-a3 no picture but backlights

[jtcurtis]

Re: e701i-a3 no picture but backlights

I have a 701i - a3 with same symptoms picture with no sound and back light comes on. I have 480 ohms on transistor on one leg + 1.7 on the other. Is that functional? When I check the power I have no electricity on the silver capacitor no readings on the other inductors except for 100 which gives me 12.3. The transistor also gives me no electricity reading. So it ohms good but no volts. What could be the issue?

[nomoresonys]

Re: e701i-a3 no picture but backlights

Wasn't clear if it had side tabs or not, now we ARE.

[budwich]

Re: e701i-a3 no picture but backlights

the "tape thing" doesn't work if there are side tabs which the set has. Good that you found them and "saved" the set.

[kevinm34232]

Re: e701i-a3 no picture but backlights

FYI I tried the tape thing with no luck as I was going about blindly anyway. But the fix for this 70" was exactly the same for the D650i-B2.

https://www.badcaps.net/forum/showthread.php?t=81665

[nomoresonys]

Re: e701i-a3 no picture but backlights

I think most start on outside and work their way in, mostly trial and error.

[kevinm34232]

Re: e701i-a3 no picture but backlights

I see what they're doing with the tape, but is there any method for which pins to cover or trial and error?

[nomoresonys]

Re: e701i-a3 no picture but backlights

Guess you could try the "cut tape" method, sometimes you have to fuss with tape placement to get it right, might not work but doesn't cost much: https://www.youtube.com/watch?v=j7vl7-vZEL8

[nomoresonys]

Re: e701i-a3 no picture but backlights

Maybe check the mlcc caps on driver board for shorts or very low ohms, guess it could also be a tcon issue.

[budwich]

Re: e701i-a3 no picture but backlights

are you looking from the front? Side tabs (no boards) are only visible when the front plastic bezel is removed.... but a 65 may not have them. I think they do... 60 or smaller usually don't.

[kevinm34232]

Re: e701i-a3 no picture but backlights

@Kevin, take it slow, tab removal can not be undone, in a lot of the tvs that were fixed by this ingenious method, thanks Freakafter8, had horizontal lines running thru the display, which is not to say that it has to be, just that you want to make sure the tab/s are the problem before removal. Did you try the disconnect one ribbon cable at a time to see what you have on display?

Yes I have repaired an E701i-A3 with the same issue and fix. One side of this panel is bad I just don't think there are side tabs on this one. I took one apart with a broken screen a couple weeks ago but didn't pay attention.

[nomoresonys]

Re: e701i-a3 no picture but backlights

@Kevin, take it slow, tab removal can not be undone, in a lot of the tvs that were fixed by this ingenious method, thanks Freakafter8, had horizontal lines running thru the display, which is not to say that it has to be, just that you want to make sure the tab/s are the problem before removal. Did you try the disconnect one ribbon cable at a time to see what you have on display?

[kevinm34232]

Re: e701i-a3 no picture but backlights

Has anyone messed with a Vizio D650i-B2? I have one where there's just ghosting picture of vertical lines but disconnecting one side of the panel at the T-Con board gives a good half picture on the other side of the screen. I have not taken the TV apart down to the panel to see if there are any side ribbons that can be removed. Panel # T650HVN05.9

[Biggnate81]

Re: e701i-a3 no picture but backlights

I can't believe this post is still active 4 years later... Anyways i was recently given an E701i-a3. Using this thread i replaced the T-Con Board and disconnected the right side drivers from the LCD panel and too my surprise i got a nice picture on the TV. The only problem is the faint " white" spots around the bottom half of the screen, they are really only noticeable when a white picture is displayed on the screen. Is there a fix for these "white" spots or is this as good as its going to get? Sorry for the terrible picture, it is difficult to get a good picture of these spots.

[nomoresonys]

Re: e701i-a3 no picture but backlights

20 vdc, on meter black probe goes in com red probe in the one with v ma marking.

[grandjury3]

Re: e701i-a3 no picture but backlights

[QUOTE=nomoresonys;929874]Can you post a picture of it? usually you just poke your probe down from the top a little til you hit metal, guess you could use some stripped bread ties.

gotcha thanks, I am new to all this , trying to figure out what setting to set the multimeter to as well, I am new to this level of repair

[nomoresonys]

Re: e701i-a3 no picture but backlights

Can you post a picture of it? usually you just poke your probe down from the top a little til you hit metal, guess you could use some stripped bread ties.

[grandjury3]

Re: e701i-a3 no picture but backlights

Start with #3 below, try to do it just as instructed, as always BE VERY CAREFUL when working with powerboard, there are DEADLY voltages on HOT side.

I attempted to test this voltage, I am unable to find a place to put the positive side on the powerboard because it is surrounded by plastic. what should I do? can I test it from the maine board side? thanks

[grandjury3]

Re: e701i-a3 no picture but backlights

Did they tell you what symptoms the tv was exhibiting?

Yes, when I turn it on the backlight comes on and no picture, but there is audio

[nomoresonys]

Re: e701i-a3 no picture but backlights

Did they tell you what symptoms the tv was exhibiting?

[grandjury3]

Re: e701i-a3 no picture but backlights

thank you so much for the quick reply! I'm going to try that right now , I'll post how it goes