Vizio E470VL backlight circuit sensitivity

[Anthony M]

Re: Vizio E470VL backlight circuit sensitivity

Can someone tell me the size of the bulbs.
Thanks

[Taterbug]

Re: Vizio E470VL backlight circuit sensitivity

Unfortunately when I was moving the LCD Panel as I was setting it down I chipped a very small nick in the corner . Will have to put this one aside until I can find a new panel.

[Agent24]

Re: Vizio E470VL backlight circuit sensitivity

Check the signal cables to the panel are connected properly.

It's also possible you damaged the panel or drivers when replacing the backlights. Unfortunately if this has happened it is not fixable.

[Taterbug]

Re: Vizio E470VL backlight circuit sensitivity

Finally got the backlight working by replacing one of the bad backlight lamps. Now it does not shut down but I have a new problem. In the attached photo you will see all these lines in the screen that was not their before.. Any ideas what would cause this???

[tibimakai]

Re: Vizio E470VL backlight circuit sensitivity

http://www.ccflwarehouse.com/ccfllamps.html

[ecking767]

Re: Vizio E470VL backlight circuit sensitivity

at $5.75 a lamp isn't bad and he will have back up lamps just in case another fails.

[budm]

Re: Vizio E470VL backlight circuit sensitivity

I am not so sure about buying used lamps unless you have no choice.

[ecking767]

Re: Vizio E470VL backlight circuit sensitivity

I took off the LCD screen and the White plastic cover where I could observe all of the lamps real close. I found the problem one of the lamps was starting to flicker just slightly and could only be noticed with the white plastic screen removed. I removed the lamp and that solved the problem of the backlight shutting down. Now to find a replacement lamp. Does anyone know a source where I can buy a single lamp? I would replace all of them but have already spent a ton on this set. I am planning on just replacing the single lamp for now and keep the TV and watch it a while to make sure everything is ok.

http://www.ernestos-electronics.com/...-4mm-x-1074mm/

these are from a Vizio 47" TV

[budm]

Re: Vizio E470VL backlight circuit sensitivity

Info about CCFL, EEFL.

[budm]

Re: Vizio E470VL backlight circuit sensitivity

Do the lamp ends have metal cap on it? If I remember correctly, it is not CCFL, I just do not remember the name of it right now, it is another type fluorescent that uses different electrode ends, they can be connected in parallel with out having ballast cap per lamp.
OK, I found some info, they may be EEFL (used in LC470 series panel).

[Taterbug]

Re: Vizio E470VL backlight circuit sensitivity

Thanks

[audiofreak19]

Re: Vizio E470VL backlight circuit sensitivity

Ccflwarehouse.com

[Taterbug]

Re: Vizio E470VL backlight circuit sensitivity

I took off the LCD screen and the White plastic cover where I could observe all of the lamps real close. I found the problem one of the lamps was starting to flicker just slightly and could only be noticed with the white plastic screen removed. I removed the lamp and that solved the problem of the backlight shutting down. Now to find a replacement lamp. Does anyone know a source where I can buy a single lamp? I would replace all of them but have already spent a ton on this set. I am planning on just replacing the single lamp for now and keep the TV and watch it a while to make sure everything is ok.

[Taterbug]

Re: Vizio E470VL backlight circuit sensitivity

All the lamps light equal. Tcon combined with main and no caps on boards. Should have new cables by Tuesday. If that don't fix it then I will set it aside until I find one with a broken screen and use for parts.

[budm]

Re: Vizio E470VL backlight circuit sensitivity

OH, and the LCD panel model number?

[budm]

Re: Vizio E470VL backlight circuit sensitivity

Are there any small blue caps on the board where the lamps are connected to?

[stj]

Re: Vizio E470VL backlight circuit sensitivity

There are 20 tubes and my VO420E has 18 tubes.

i know it looks like 20,
i assumed it was using "U" shaped tubes or it would need twice as many invertor outputs.

[audiofreak19]

Re: Vizio E470VL backlight circuit sensitivity

When the tv backlight turns off can you still shine a light behind it and still see a picture. That would eliminate the t con and panel.

[audiofreak19]

Re: Vizio E470VL backlight circuit sensitivity

Do all of the ccfl bulbs light up to the same brightness. If one is duller then the others it means its on the way out. That could be the only thing I would think since you have replaced the main and power board multiple times. Does your model have the t con built into the screen or is it a separate board? If it's separate or I guess even fixed if for some reason there is a fault in the t con and it shuts down and looses the video signal it will shut the backlights off.

[Taterbug]

Re: Vizio E470VL backlight circuit sensitivity

All the lamps DO light up. I have the model that has the PS and inverter board combined. I have replaced this board as well as the main board ( twice ). I did find some arc spots underneath the boards that the lamps are connected too. I cleaned these areas and reinsulated with electrical tape. Still same problem!! Waiting on cables to arrive but this really has me stumped. Plays at most two or three minutes before I loose lamp signal shutting down back lights. ?????