Vizio E320-A1 no picture or backlight.


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Vizio E320-A1 no picture or backlight.

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HelpMeThanks
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Aug 9, 2017, 12:15 AM

Post #1 of 9 (4114 views)
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Vizio E320-A1 no picture or backlight.	Can't Post

Hello, I have a Vizio E320-A1 TV that does not have a picture or backlight. When I turn the TV on its power light stays on in a white color. Once it is on I cannot turn the TV back off (turn the light off). Holding/pressing the power button does nothing to turn it off.

If I plug the TV in the light comes on and stays on. If I unplug it, hold the power button for 15-20 seconds, then once I plug it back in the light will not come on until I press the power button.

Holding a flash light to the screen when the power light is on does not show any visible picture and the backlight does not come on as well.

Also, if I do the above where I unplug the TV, hold the power button and then plug it back in, then the TV makes a slight high-pitched noise just like any TV that is on. There is no picture here, and once I press the power button the noise goes away.

Pictures.

Power board: http://imgur.com/a/k961c

Main board: http://imgur.com/a/zynDy

Tv info: http://imgur.com/a/jzxob

Pins from power board to main board: http://imgur.com/a/ZYEBk

Alright, here are the voltages from the last picture's pins:

OFF/Unplugged after holding the power button down for 15-20 seconds:

Code

ON/OFF: 0.0v 
DIM: 0.0v 
12V: 0.0v 
12V: 0.0v 
GND 
GND 
GND 
12V_Audio: 0.0v 
12V_Audio: 0.0v 
PS_ON: 0.0v 
5.2V: 0.0v 
5.2V: 0.0v 
NC>: 0.0v

OFF/Unplugged after holding the power button down for 15-20 seconds, plugging back in, pressing power button, and unplugging again:

Code

ON/OFF: 0.0v 
DIM: 0.0v 
12V: 0.01v 
12V: 0.01v 
GND 
GND 
GND 
12V_Audio: 0.01v 
12V_Audio: 0.01v 
PS_ON: 0.01v 
5.2V: 0.01v 
5.2V: 0.01v 
NC>: 0.0v

ON?/Plugged in, power light off:

Code

ON/OFF: 0.03v 
DIM: 0.04v 
12V: 11.89v 
12V: 11.89v 
GND 
GND 
GND 
12V_Audio: 11.89v 
12V_Audio: 11.89v 
PS_ON: 0.09v 
5.2V: 5.11v 
5.2V: 5.11v 
NC>: 0.0v

ON/Plugged in, power light on:

Code

ON/OFF: 0.06v 
DIM: 0.09v 
12V: 11.68v 
12V: 11.68v 
GND 
GND 
GND 
12V_Audio: 11.68v 
12V_Audio: 11.68v 
PS_ON: 5.08v 
5.2V: 5.10v 
5.2V: 5.10v 
NC>: 0.0v

Any ideas on what could be wrong with this TV? Thanks for any help!

(This post was edited by HelpMeThanks on Aug 9, 2017, 1:39 AM)

jts1957
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Aug 9, 2017, 6:28 AM

Post #2 of 9 (4091 views)
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Re: [HelpMeThanks] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

http://www.shopjimmy.com/...-kit-for-e320-a1.htm

Make sure that ALL numbers match. That set lists more than one Main board.

-------------------------
Location: Far, Far Away

HelpMeThanks
New User

Aug 9, 2017, 7:11 AM

Post #3 of 9 (4087 views)
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Re: [jts1957] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

Thanks for the help!

I'm not sure if my TV and the repair set you linked match.

I figured out the second part of it though. The one you linked has TXDCB02K028 in the name and so does my TV. Where does 756 come from though? How do I verify that number? Can I get the numbers on the ICs that I'll be buying?

Here are some better pictures of the numbers on my main board: http://imgur.com/a/IEgu3 (sorry about the rotation, Imgur didn't want to work with me)

I think they match. Also, are some of the chips hiding under the big metal rectangle? It's attached with some solder so I would have to desolder that.

Thanks again!

(This post was edited by HelpMeThanks on Aug 9, 2017, 7:16 AM)

jts1957
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Aug 9, 2017, 9:13 AM

Post #4 of 9 (4071 views)
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Re: [HelpMeThanks] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

Clicking on your model number at bottom will give all boards for your set. Clicking on your board will give other part options (if applicable). 'X' ing out of option allows you to scroll through various info for the board. Even if no longer available, info is still retained.

http://www.shopjimmy.com/...oard-for-e320-a1.htm
You most likely just need the EEPROM. http://www.shopjimmy.com/...u403-eeprom-only.htm

The location numbers are usually supplied with the parts.

-------------------------
Location: Far, Far Away

(This post was edited by jts1957 on Aug 9, 2017, 9:20 AM)

HelpMeThanks
New User

Aug 9, 2017, 7:40 PM

Post #5 of 9 (4059 views)
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Re: [jts1957] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

Thanks! The location number given on that page is U403, and the only one I can find on my board is U408. It does say that this one may not be an exact copy, but how do you verify which chip is the EEPROM?

You also said the location number is usually shipped with the chip, so should I expect a different chip?

Thank you for your time.

jts1957
Veteran

Aug 9, 2017, 8:07 PM

Post #6 of 9 (4057 views)
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Re: [HelpMeThanks] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

Have you perused under 'the big metal rectangle'?

-------------------------
Location: Far, Far Away

HelpMeThanks
New User

Aug 9, 2017, 8:40 PM

Post #7 of 9 (4055 views)
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Re: [jts1957] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

Ha, no, not yet. I'll desolder it.

HelpMeThanks
New User

Aug 16, 2017, 5:17 AM

Post #8 of 9 (4018 views)
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Re: [HelpMeThanks] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

The chip was under the rectangle. I tried to desolder the chip but I do not have a hot-air rework station and had to use a normal soldering iron. I ended up using too much heat and two of the solder pads came off with the chip... I guess I'll look into repairing those maybe.

Thank you for your time!

jts1957
Veteran

Aug 16, 2017, 6:26 AM

Post #9 of 9 (4016 views)
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Re: [HelpMeThanks] Vizio E320-A1 no picture or backlight. [In reply to]	Can't Post

Shoulda done this: https://www.youtube.com/watch?v=0TJQ9-fRs0M

-------------------------
Location: Far, Far Away

(This post was edited by jts1957 on Aug 16, 2017, 6:29 AM)

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