Vizio E470i no power

[BEAUFORD_SAVAGE]

Re: Vizio E470i no power

post too old

[BEAUFORD_SAVAGE]

Re: Vizio E470i no power

Not aware of the color codes? Look up and print out, you will need these all the durned time.
I am working on the SAME TV and about 1/2 the backlight diodes were fried.
I am awaiting replacement strips right now in mail.
Glad I learned the reset technique.

[budm]

Re: Vizio E470i no power

https://www.badcaps.net/forum/attach...9&d=1518374864
You need to report the Voltage readings on the connector CN201 of the power supply board that goes to the main board next. As you can see, there are labels for each pin of that connector so you MUST put down the pin name and follow by the Voltage reading for each pin.

[lfhlaw]

Re: Vizio E470i no power

ok. I did check to see if the power made it through the cable to the main board and it does. I think the wi-fi card must be the plug in the lower left hand corner, because the other black/white wires went to the power button on the side, and I'm guessing the remote sensor. The one midway up on the left went to the speakers.

I unplugged the wi-fi and still no indicator light whatsoever. So i'm guess the Main board is bad? thinking it's one of the main CPU chips possibly that go bad.

I've included pics of the main board.

finally figured out that the main board is functioning but the LED lights are not functioning. I can do the flashlight test and see images.

I have an LED light tester and all the led lights do light up using that. So do I need to replace the little board that ...umm..i guess transfers power to the led light?

[lfhlaw]

Re: Vizio E470i no power

ok. I did check to see if the power made it through the cable to the main board and it does. I think the wi-fi card must be the plug in the lower left hand corner, because the other black/white wires went to the power button on the side, and I'm guessing the remote sensor. The one midway up on the left went to the speakers.

I unplugged the wi-fi and still no indicator light whatsoever. So i'm guess the Main board is bad? thinking it's one of the main CPU chips possibly that go bad.

I've included pics of the main board.

[budm]

Re: Vizio E470i no power

So with all the boards connected you do have 5VSTBY for the main board to run but you are not even getting any indicator lights to come on, so you need to troubleshoot the main board next. This is smart TV so try disconnecting WIFI card if it has one.

[lfhlaw]

Re: Vizio E470i no power

ok. i think i did it, i also included a picture of my multimeter settings and amount.
Got 5.23 v.
, so i guess I got standby power.

[budm]

Re: Vizio E470i no power

https://www.badcaps.net/forum/attach...8&d=1518374864
Mount the board back in place using all the screws, then check the DC Voltage on pin 1 (5.1V SB) of the connector CN201 with ref. to the chassis GND.

[lfhlaw]

Re: Vizio E470i no power

ok i uploaded the pictures.

[lfhlaw]

Re: Vizio E470i no power

ok I'll get those pics up. I did look for Bulging Capacitors of which there were none.

[budm]

Re: Vizio E470i no power

Well, at this point you need to upload good clear pictures of the top and bottom side of your power supply board, you will need to test Voltages on the connector that goes to the main board.

[lfhlaw]

Re: Vizio E470i no power

No indicator lights at all or what?
Do you have meter to test Voltages?

Nope no indicator lights at all. Normally, most Tv's will at least light up the indicator light, but even that's not coming.

I do have a meter, but not very good with it lol.

[budm]

Re: Vizio E470i no power

I came into this E470i-AO. I've replaced both boards(PSU and main) of this TV and I cant get it to Power up at all. Will a bad LED strip cause the TV to not power on at all on this TV?

No indicator lights at all or what?
Do you have meter to test Voltages?

[lfhlaw]

Re: Vizio E470i no power

I came into this E470i-AO. I've replaced both boards(PSU and main) of this TV and I cant get it to Power up at all. Will a bad LED strip cause the TV to not power on at all on this TV?

[Daveleone]

Re: Vizio E470i no power

I think I figured it out. I believe it goes - thick plastic board, thin plastic sheet, prism reflective sheet, thin plastic sheet (from LEDs upward).

My guess is based on the diagram in Figure 4 on page 2 here: https://cdn.badcaps-static.com/pdfs/...214da42065.pdf

I put the tv back together this way and I'm happy with the way it looks

Special thanks to @nicegut for the help!

[Daveleone]

Re: Vizio E470i no power

Can anyone tell me in what order the diffusion layers go (between the LEDs and the lcd panel)? I took the thing apart to repair the LEDs and can't remember in what order to put it back together, lol! I should've taken pictures.

There are 2 thin white plastic sheets, a thin highly reflective sheet, and a thick white plastic board. What order do they go in, from LEDs upward?

Your help is greatly appreciated!

[SLK001]

Re: Vizio E470i no power

I have one of these E470i-A0 with two LEDs out. Does anyone know of a source for the LEDs (components, not strips)? I've looked at both Digikey and Mouser, but I have yet to be able to sift through all the available devices. These devices have the large pad on the anode (+ side) of the LED. The LED size is 2.8mm x 3.5mm x 0.65mm.

[dick_barton]

Re: Vizio E470i no power

Maybe searching online for an identical model as yours but cracked screen could be the cheapest option.

[Daveleone]

Re: Vizio E470i no power

Maybe if you PM Nicegut who posted earlier and see where he got his from.

He didn't buy replacement strips. He repaired his existing strips by soldering in new LEDs. I'd rather replace all my strips. Still looking for a source...

[dick_barton]

Re: Vizio E470i no power

Maybe if you PM Nicegut who posted earlier and see where he got his from.