Vizio 32" no power SV320XVT

[vegadc2]

I purchased a dead Vizio that didnt have any power in it (no orange stand-by) hoping to find something obviously wrong with it, bulging caps, blown fuse, etc...

Well I took it apart inspected every board, and they all seem to be fine, no bad caps, no NOTICEABLE bad fuses.

maybe a bad Power Supply, I would like to test out the boards myself but dont know what exactly to look/check for

[PlainBill]

Re: Vizio 32" no power SV320XVT

I purchased a dead Vizio that didnt have any power in it (no orange stand-by) hoping to find something obviously wrong with it, bulging caps, blown fuse, etc...

Well I took it apart inspected every board, and they all seem to be fine, no bad caps, no NOTICEABLE bad fuses.

maybe a bad Power Supply, I would like to test out the boards myself but dont know what exactly to look/check for

Check intermediate and output voltages on the power supply. Check the standby output and the voltage on the control line.

PlainBill

[vegadc2]

Re: Vizio 32" no power SV320XVT

Correct me if im wrong. My understanding when you said output, you are saying to check the output pins that go from the power supply to the main board.
but what exactly do you mean when you say "intermediate" power?

Sorrt for my noob-ness

[PlainBill]

Re: Vizio 32" no power SV320XVT

Correct me if im wrong. My understanding when you said output, you are saying to check the output pins that go from the power supply to the main board.
but what exactly do you mean when you say "intermediate" power?

Sorrt for my noob-ness

Intermediate = voltage on the large filter cap and voltages on the Standby and Main SMPS controllers.

When given only a minimal amount of information I can respond only with minimal suggestions. As they say, a picture is worth 1000 words.

PlainBill

[vegadc2]

Re: Vizio 32" no power SV320XVT

Intermediate = voltage on the large filter cap and voltages on the Standby and Main SMPS controllers.

When given only a minimal amount of information I can respond only with minimal suggestions. As they say, a picture is worth 1000 words.

PlainBill

i apologize, I thought i had uploaded a picture of the board itself.

[Dgtech]

Re: Vizio 32" no power SV320XVT

You can post pictures to this thread. When posting pictures use "Manage Attachments" on the post page. I looked up this board on ebay just to see a picture of this board. There is no proof yet that this is the same board that you have. So please post a pic.

If the one that I saw is the same, then you have two main filter caps dead center of the board. Check the voltages there to gound. Also, check the pins on the output of the power supply.

I know, for me, it makes it easier to first take a picture of the board and then use paint to make notes of voltages ect...

First things first, you'll get better responses when you provide pictures - clear pictures.

[Dgtech]

Re: Vizio 32" no power SV320XVT

Well, right when I was posting that, you posted the picture. Thanks!!

OK.... Check the picture that I revised below. The green box is the fuse. Check the resistance of this with the power off and disconnected. If the fuse is OK (zero ohms .1 sometimes depending on meter) then check the caps in the red box with power on. Check the power to ground and report back.

[vegadc2]

Re: Vizio 32" no power SV320XVT

Well, right when I was posting that, you posted the picture. Thanks!!

OK.... Check the picture that I revised below. The green box is the fuse. Check the resistance of this with the power off and disconnected. If the fuse is OK (zero ohms .1 sometimes depending on meter) then check the caps in the red box with power on. Check the power to ground and report back.

you are talking about the green box in the middle of the board, or all of them?

Also, when you say red box did you mean the 2 long red caps?

again i apologize for not knowing the terminology

[PlainBill]

Re: Vizio 32" no power SV320XVT

you are talking about the green box in the middle of the board, or all of them?

Also, when you say red box did you mean the 2 long red caps?

again i apologize for not knowing the terminology

Somebody else forgot to attach a picture. Glad to see I'm not the only one who does that.

PlainBill

[Dgtech]

Re: Vizio 32" no power SV320XVT

LOL, yeah, my own little moment.

Here is the picture that I was referring to.

[acewallace]

Re: Vizio 32" no power SV320XVT

I'm having the same problem . what was the outcome of your testing?

[Eddie.zapien]

Re: Vizio 32" no power SV320XVT

did anything come of this? I'm having the same problem.

Thanks

Eddie

[Dgtech]

Re: Vizio 32" no power SV320XVT

post pictures of your boards and start over. It may be different boards and different problem.