Re: VIZIO E70-E3 Half picture with half TCON
Bump!
I'm still interested in hearing your ideas and suggestions on what to do next.
Thanks.
Fly_Among_Stars
Member
Last Activity: 06-09-2023, 08:00 PM
Joined: 04-24-2023
Location: Madison, Alabama
-
Re: VIZIO E70-E3 Half picture with half TCON
Update
I found that if I taped pins 9 and 10 on the U-Ribbon I can consistently get a full picture. If either of those pins are not covered, the screen is black.
Unfortunately, as can be seen in the images, it wasn't the only problem.
I noticed that slight pressure on the right side affected the horizontal lines, so I pulled back the bezel on the TV screen's right side and noticed that those side tabs were smashed in half and that the screen wasn't fully taped down cleanly like it was on the left side.
I...Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
I've been trying the taping method and really want getting anywhere.
I don't know what pins I should tape, how many at a time, and what side to start from in the ribbon cable.
I pulled off the bezel, and noticed the LCD board is split in two. Simply disconnecting one half results in only 1/4 screen white! Getting closer.
So then, I applied a small piece of tape on that connector and got almost a full image but with distortion.
Question: is it okay to perform the tape on that connector?...Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
Any thoughts on the different voltages I measured on the test points under the two ribbon connectors?Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
It's a long beep. I do get short beeps on the others, but I disregarded them.Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
And they're measuring 3.2V. sorry for not doing that first to verify and make us chase a red herring.Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
Okay, so this is unexpected. I only get a beep, short, when the negative probe is on the top and positive on the bottom. But only for those three caps. If I reverse the probe ends, no beep.
Other caps on the board do not care which probe end is on the right or left or top or bottom.Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
Those caps measure around 6.8k ohm with power off. And in beep mode, negative probe on screw, beep on bottom lead. But apparently all the caps beep on one side when negative probe is on screw.
And while power is off, those caps are not short, they don't beep if measuring across top and bottom leads.Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
Probe on either end of the caps, the silver ends.
When probing the test points, I had negative lead on a screw and positive end in test point.Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
I think I read that one. I was hesitant to go that route right away because it's permanent and I wasn't sure it was exactly my situation.
I wanted to understand if there were other options to explore first...and I'm not feeling that confident about ripping stuff yet. It feels like a big step.Leave a comment:
-
Re: VIZIO E70-E3 Half picture with half TCON
I was going to try the tape trick next, but wasn't sure it was worth it if given the way the voltages on the board were dissimilar between the two sides.
But I also wasn't sure if a problem downstream was why the voltages were different. Cause or effect?Leave a comment:
-
VIZIO E70-E3 Half picture with half TCON
Hi,
I have a VIZIO E70-E3.
Symptoms: Black screen, no picture, but LED backlights are working.
I probed the power board and voltages are as listed on the board.
Main board appears fine, too.
I believe the problem is either a bad T-CON board, or connection to LCD, or bad LCD.
There are two separate ribbon cables feeding the LCD.
If both are connected, the screen is black.
If only the ribbon cable that feeds the right side of the screen (when viewed from the front) is disconnected, the left side of the screen shows picture and... -
Re: New Members - please post your introductions here
Hi, just joined so I could troubleshoot an LCD TV, but now that I'm here, I'd like to learn some more stuff. I'm impressed with this site.Leave a comment:
No activity results to display
Leave a comment: