Vizio E470VL, no picture

[dav255]

I have a Vizio E470VL that displays no picture. The backlight turns on, sound comes on, but there is no visible picture. No Menu's, volume, input, just a nice backlight black screen.

I am unsure what caused this issue as it was handed down to me and I thought it would be a quick repair.

I searched all over google through forums and concluded it was the main board I had to replace. So i bought one from ebay and swapped the part. Exact same issue. So I thought maybe something from the power board is malfunctioning.

Returned the first main board and bought a power board. Swapped the power board, same issue. I thought maybe I got a bad part from ebay the first time since everything kept pushing me to conclude it was a main board issue.

Returned the power board and got a new main board from a different seller on ebay. Swapped the board, same issue... I am returning the new board and keeping my old board since i noticed the same issue.

I have concluded my boards are good, and the issue lies else where. I believe the issue has to be either the ribbo inen cable, or the lcd screen.

My question is am I missing something between the board and the lcd screen? I see the ribbon cables connect to the top of the lcd panel and see two small boards. Not sure what they are or do. It is also my understanding that this tv has the tconn integrated to the mainboard.

I am also unsure what happens when an LCD screen goes bad. Hope I was through in explaining my issue.

Thanks

[budm]

Re: Vizio E470VL, no picture

Check the surface mounted fuse on the T-CON board to see if it has 12V (or 5V depends on the LCD panel) on both ends of the fuse, this board is under the metal shield. Pictures of the back of the TV will help. Your panel may have integrated T-CON board type.

[Glitcher]

Re: Vizio E470VL, no picture

Hmm, assuming that the two new main boards are good and there is no tcon board for this set the last thing left would be the panel itself I'm afraid...

[dav255]

Re: Vizio E470VL, no picture

Sorry for the late response, here are a few pictures of the back.

Quality is a little bad due to phone camera.

http://imgur.com/a/ioc3M

[dav255]

Re: Vizio E470VL, no picture

When I unplug the left ribbon cable i get an image on the right but white on the left.

http://imgur.com/aUIJheP

So it looks like my panel is good. but something goes bad when I plug in the left side.. Any suggestions?

[dav255]

Re: Vizio E470VL, no picture

I tried some other combinations and now I cant get the backlight to come on. Tried the flash light test and did not notice a picture either.

[amdmadcap1]

Re: Vizio E470VL, no picture

Did you get an answer to this? I have the same exact issue on a Vizio E470VLE

[nomoresonys]

Re: Vizio E470VL, no picture

another NO FOLLOW UP, gee thanks.

[nomoresonys]

Re: Vizio E470VL, no picture

amdmadcap1, try to post good clear pics. of each board and one of how they are all connected, maybe start by testing expected voltages on power supply board, there should be a label by the connectors, as always be careful working with power supply, HIGH VOLTAGE, on primary side can be deadly.

[nomoresonys]

Re: Vizio E470VL, no picture

might as well use this abandoned thread, cuts down on clutter anyway.

[budm]

Re: Vizio E470VL, no picture

When I unplug the left ribbon cable i get an image on the right but white on the left.

http://imgur.com/aUIJheP

So it looks like my panel is good. but something goes bad when I plug in the left side.. Any suggestions?

That means you have bad panel, the TFT drivers or MLCC shorted out.

[ralphebuoy]

Re: Vizio E470VL, no picture

i have a similar issue with vizio vo47l-fhdtv10a i googled my problem, and followed a few suggestions. i did the flashlight test and did see images, which i was told means one or both of my inverters were bad. i just received the parts today( by the way i ordered them from shopjimmy.com i paid $44.00 including shipping, for both master and slave) installed first the master and when that did not resolve the no pic issue i added the slave, same problem i can see images with flashlight,but no pic.
could it be a fuse or the back-light itself and if it is the back-light would that be a relatively easy fix?

[budm]

Re: Vizio E470VL, no picture

Do you have 24VDC from the power supply board feeding the inverter boards?