Vizio E470VL tv problems

[Cue]

I got this TV from my uncle, he said the TV started to have problems when the lights went off and on during a Thunderstorm, he said the tv wouldn't come on once that happen so he opened it up, looked around, and he didn't see anything suspicious, when he put the tv back together by surprise the tv started to work again, but after a few weeks it stopped working. Now i have it.

Whenever I plug the tv in, the orange light on the Vizio logo would come on and when i press the power button on the tv, the white light on the Vizio logo would come on,
But the tv wouldn't come on at all, now after turning it on and off a few times only the orange light will come on, the white light doesn't come on any more..

Anyone know a fix for this issue? I will post pictures of the boards tomorrow. Board number 3647-0292-0150(3j)

[budm]

Re: Vizio E470VL tv problems

May be the EEPROM got scrambled.
http://www.shopjimmy.com/catalogsear...q=Vizio+E470VL
May be some one can tell you how to get to factory reset mode, I do not know the key combination on the remote to get into the factory setup page.

[Cue]

Re: Vizio E470VL tv problems

Here's pic's of the boards
http://imgur.com/uUVbKsx
http://imgur.com/HwhVGft
http://imgur.com/YAwUjqA
http://imgur.com/xHqhshe
http://imgur.com/IPpkYlb
http://imgur.com/kEPamYc

[Cue]

Re: Vizio E470VL tv problems

May be the EEPROM got scrambled.
http://www.shopjimmy.com/catalogsear...q=Vizio+E470VL
May be some one can tell you how to get to factory reset mode, I do not know the key combination on the remote to get into the factory setup page.

How would that be possible if the tv doesn't display picture?

[budm]

Re: Vizio E470VL tv problems

Some TV when you put it into service mode, it will disable the error that shuts down the TV to let you look at the error data, unless the power supply, the main board, or the inverter board is completely dead then you will not see anything.
You have the power supply-inverter board combo so you can at least the DCV on the connector of the power supply that goes to the main board to see what signals, or Voltages are missing, that will be my first step.

[Cue]

Re: Vizio E470VL tv problems

Here's the power board read from the multimeter

Dim 0.65
Lamp 0.00
On/Off 0.24
PS_On 1.30
12v 12.26
12v 12.26
12v 12.26
SGND 0.00
SGND 0.00
SGND 0.00
SGND 0.00
+5VSB 5.09
+5VSB 5.09
+5VSB 5.09

[budm]

Re: Vizio E470VL tv problems

"Dim 0.65
Lamp 0.00
On/Off 0.24"

On/Off 0.24V: So the backlights ON/OFF signal is not present, <1VDC = OFF, >2.5VDC = ON. This signal is generated by the main board.

Dimming control signals also very very low.

LAMP 0.00: This one I do not know if 00V = good or = bad.

[Cue]

Re: Vizio E470VL tv problems

Could a bad eeprom cause this reading?

[budm]

Re: Vizio E470VL tv problems

May be, not 100% sure. Did you try contacting shopjimmy to see what they think.

[Cue]

Re: Vizio E470VL tv problems

No but I guess I should contact them and show them this reading

[Cue]

Re: Vizio E470VL tv problems

Well, I tried talking to them in their chat room,the guy said he's not a technician

[Cue]

Re: Vizio E470VL tv problems

Can voltage regulators be An issue on this model? Can I test regulators on the board? What would the volts be for a healthy regulator on this board?

[Cue]

Re: Vizio E470VL tv problems

Also after doing readings on three surface mount fuses, I notice the orange logo would change to white all of a sudden, and I would hear crackling electric sounds Coming from the power board at random times whenever I turn the tv on.

[budm]

Re: Vizio E470VL tv problems

How to test Voltage regulators:
https://www.badcaps.net/forum/showth...999#post300999

[Cue]

Re: Vizio E470VL tv problems

Also after doing readings on three surface mount fuses, I notice the orange logo would change to white all of a sudden, and I would hear crackling electric sounds Coming from the power board at random times whenever I turn the tv on.

I did another reading on the 12v, now it's 0.00,I'm still hearing cracking sounds on the power board, and now the Vizio logo stays on orange light.