Vizio E470i no power

[AcGeorgiegirl]

Re: Vizio E470i no power

Guys, I'm wondering about this...If the pwr supply isn't connected to the main, and the only other connection to the tv is (what I am assuming) being the backlight panel, how would the ps-on get it's switch, considering the pwr supply isn't talking to the main. I understand that by jumpering v's to the ps-on and blu, I'm giving it a "direct switch" of power, but I get lost as far as how the pwr supply can then tell the main to turn the power on. I guess the other issue is that the psb didn't do its job in turning on the backlight, which is connected, anyway. Here's a pic of the layout, which might help you "get" why I'm confused about the switching issue.

[AcGeorgiegirl]

Re: Vizio E470i no power

With the power supply mounted and hooked up, measure every pin to GND. Use the pin out and the volts you measured.

ok, so "hooked up" = main board connected...or plugged into power supply?
Please give me details of how to measure pins to GND. Would I use black probe to a GND pin and red one to each of the previous pins I've mentioned(ps-on, pwm's, 12v's, and BLU? "use pin out"?

[CapLeaker]

Re: Vizio E470i no power

With the power supply mounted and hooked up, measure every pin to GND. Use the pin out and the volts you measured.

[AcGeorgiegirl]

Re: Vizio E470i no power

I now have connected a 2nd power supply I'd bought, did the jumpering, and still got nothing. I then tested the pins as before, and got these: standby's are same(5.26), pwm's are 1.77 and 12v's are 0.14. Something else...the previous power supply didn't get me a blue "on" light, but this one does. Just to remind you..the blue light comes on, then fades to nothing within 5 seconds. It won't come on when I press and hold the power button more than 2 seconds.

[AcGeorgiegirl]

Re: Vizio E470i no power

Thanks for the 'splainin, guys! Ok. So I did the jumpering for both ps-on and bl-on with no change/nothing happened. I also got a little different readings for the various pins using a smaller wire attached to my DMM. The standby's were exactly the same. The pwm's were at 1.82, the 12v's were at .17.

[Hamie]

Re: Vizio E470i no power

Ok. I don't know what you guys mean by "jump", sorry I'm sure I can do it, but could you give me an idea of what you mean? Thanks!

No probs,

Disconnect the wire going to main board,

Then with a piece of wire, paper clip etc, you need to connect ps-on to the 5v line. And also bl-on to 5v

Kinda like this,

[Terryfictv]

Re: Vizio E470i no power

Put a straight pin in the connector with the wire at bl-on,
sb5v and ps-on then use alligator clip leads to hook them
together.....HTH

[AcGeorgiegirl]

Re: Vizio E470i no power

Ok. I don't know what you guys mean by "jump", sorry I'm sure I can do it, but could you give me an idea of what you mean? Thanks!

[Hamie]

Re: Vizio E470i no power

Disconnect the main board,

Jump ps-on to 5v
And also bl-on to 5v

All voltages should now be present and the back light should turn on.

[AcGeorgiegirl]

Hi everyone,
I've replaced the power supply board to no avail. Here's what it's doing...It sometimes will give a blue(standby?) light, but this light quickly fades to nothing(weird??!!). I've checked the pins on the connector...standby is at a bit over 5v, blu is 0(after the multimeter cycles down in numbers), and pwm1 and pwm2 are both at 0.96. The pson is also at 0 after cycling down. I haven't tried testing the main side yet, because I really don't know where to start. i've never tested diodes and bridges and whatever other thingys I keep hearing about, but I will give it a try. My multimeter doesn't give esr values, unfortunately, to start testing the caps. I didn't think caps would be the first priority?