Vizio E470VL "2 seconds to black"

[burkewm]

Hello all. Have an E470VL that has a common problem with no resolution yet. When the power button is pressed on the side of the TV, it infinitely cycles in this manner: on with the front logo turning white and the white vizio logo displaying on the screen for about 2-3 seconds, then off and back to amber, rinse and repeat... When the power is pressed on the remote, however, it only power cycles once in this manner.

All 5v standbys are present with the power cord attached. When the power is pressed, all 12v pins also read correctly when the TV is attempting to power up. I have replaced the U14 eeprom after ordering the correct part from shopjimmy, but the TV behaves the same. No caps appear to be bulging or leaking. I've also tried unplugging the IR board ribbon cable, but same results. I have some decent troubleshooting experience and have fixed a couple Samsung sets prior to this, but I'm stumped on this one.

Pictures attached. Thanks for any help you all can provide!

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Any ideas anyone? I'll try anything...

[budm]

Re: Vizio E470VL "2 seconds to black"

Vizio 0500-0407-0700 Power Supply / Backlight Inverter
DELTA DPS-270DPA
http://www.shopjimmy.com/vizio-0500-...pply-unit.htm#

Pictures provided by shopjimmy.

We need you to report the DCV readings of the pins (except the GND pins) of the connector CN201.
Please report them in this format so it will be easy to see if the command signals or Voltages are missing or not when power switch is activated.
CN201:
Pin 1, 2, 3: +5VSB = xxxV
Pin 3, 4, 5, 6: SGND
Pin 7, 8, 9: 12V = xxxV
......
......

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Pin 1, 2, 3: 5.12V each
Pins 4-7: 0.00V each
Pins 8, 9, 10: 12.25V each
Pin 11: 2.24V
Pin 12: 3.24V when logo is white and attempting to power up, 0.00V when amber
Pin 13: 0.05V when logo is white, 0.00V when amber
Pin 14: 3.24V for half second after logo is white then 2.92V until logo goes amber when it drops to 0.71V

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Pins 1-3: +5VSB
Pins 4-7: SGND
Pins 8-10: 12V
Pin 11: PS_ON
Pin 12: I-ON/OFF
Pin 13: LAMP
Pin 14: DIM

[budm]

Re: Vizio E470VL "2 seconds to black"

Well it has the correct control signals from the main board.
Can you try unhook the cables to the panel buttons board and use the remote to turn on the TV?
I see SJ is selling EEPROM and the ICs for the main board repair kit.
http://www.shopjimmy.com/catalogsear...q=Vizio+E470VL

[hmendez86]

Re: Vizio E470VL "2 seconds to black"

the problem there should be your led.. i had a similar problem with a 32inch tv and it was the leds for about 2sec it shows the logo when tv is turn on and it goes off. i tried everything and i was thinking the main board but a friend told me it was the leds. any ways since i don't trust him well. i take the chance and check the led and boom they were blowwn!!! i replace the all strip and it worked again....

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Budm from what I see the panel buttons are on the main control board. Which cable should I unhook?

Mendez which LEDs are you talking about? Can you describe their location?

[cliff_hootarski]

Re: Vizio E470VL "2 seconds to black"

He thinks your set is a "LED" backlit TV.

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Ah...

[budm]

Re: Vizio E470VL "2 seconds to black"

Ah my bad, the functions buttons are on the main board.

[burkewm]

Re: Vizio E470VL "2 seconds to black"

I've replaced the eeprom already, no difference.

[budm]

Re: Vizio E470VL "2 seconds to black"

Per SJ, there are other 2 ICs for main board repair.
http://www.shopjimmy.com/vizio-3647-...or-e470vle.htm

http://www.shopjimmy.com/vizio-3647-...repair-kit.htm

Which I am not sure if it will fix the problem or not, but you do need new main board.

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Yeah the other component in that kit fixes a different issue. Well that sucks, those are like $150. No other way to do component level troubleshooting on the main board?

[budm]

Re: Vizio E470VL "2 seconds to black"

It will be tough without the diagram.

[burkewm]

Re: Vizio E470VL "2 seconds to black"

Gotcha. Well thanks for the help. Looks like I'm just going to sell this one to someone who's willing to buy a main board for it.