No power on Vizio voj320f1a 32" led tv

[mrcrazynutz]

So, I've been trolling around and gain a lot of information but I have an issue on a vizio tv that is a voj320f1a. It had absolutely no power so I went on ebay
and found a new power board with a warranty. Replaced the power board and still no power??? Any ideas? Maybe the original power board wasn't the issue Should I return it for a refund??

Thanks for any advice in advance...
C

[Dgtech]

Re: No power on Vizio voj320f1a 32" led tv

Before you return it for a refund, Check the main fuse and the output voltages. If that's ok then check the main board's regulators.

[mrcrazynutz]

Re: No power on Vizio voj320f1a 32" led tv

ok I know there is a way of doing this and someone has it written out somewhere...
Question is where are those instructions??
Thanks..

[Dgtech]

Re: No power on Vizio voj320f1a 32" led tv

There are a lot of vizio posts here that will explain how to check regulators on the main boards. You'll find some if you search for them.

Did you check the main fuse? and rectifier voltages? Output voltages from power supply? Output voltage from wall socket? Help me help you.

[mrcrazynutz]

Re: No power on Vizio voj320f1a 32" led tv

Ok I checked what I thought was the right parts... I think...
Anyways, I believe the new power board is good because the original
one has a burn mark on the underside... So, what other board would
cause the tv to not have any power on or in standby... I mean no white
or orange power led??

[Dgtech]

Re: No power on Vizio voj320f1a 32" led tv

Well, the power board outputs power to run the set HOWEVER, the main board is responsible for the switching from standby to the ON state. What are the output voltages from the power supply? Can you post any pictures of the boards in question? We really can't go any further without either of these.

[tom66]

Re: No power on Vizio voj320f1a 32" led tv

Do you have a digital multimeter?

[mrcrazynutz]

Re: No power on Vizio voj320f1a 32" led tv

Ok here is the power board...
I do have a multimeter but my probes are to big to get into wire and connector.
I think I can stick a small gauge wire into the end of the wire connector to
check voltages but which wires should I check?? maybe by color?? red and black??
Thanks for all the help...

[mrcrazynutz]

Re: No power on Vizio voj320f1a 32" led tv

bump... anybody wanna help me out here?
I know i'm a novice but pictures and/or instructions would help out a lot...
thanks

[budm]

Re: No power on Vizio voj320f1a 32" led tv

OK, those two white connectors on the left, there are labels printed on the board, can you remove the connector and take the pictures so we can see what the labels are?
Never mind about the pictures, shopjimmy has good clear pictures.
Black probe on the CN3 GND, RED probe on 5VSB.
http://www.shopjimmy.com/media/catal...5-0540-top.jpg
Picture provided by SJ.

[Caleb]

Re: No power on Vizio voj320f1a 32" led tv

I had a 32" vizio awhile back that fed all the 5v standby through the main board, open fuse on main board caused dead set, tested no shorts and put in a new fuse and everything worked again. maybe yours is set up the same way?

[mrcrazynutz]

Re: No power on Vizio voj320f1a 32" led tv

I had a 32" vizio awhile back that fed all the 5v standby through the main board, open fuse on main board caused dead set, tested no shorts and put in a new fuse and everything worked again. maybe yours is set up the same way?

There are no fuses on the top of the board... didn't check underneath but I doubt this one has a fuse on the main board...

[mrcrazynutz]

Re: No power on Vizio voj320f1a 32" led tv

OK, those two white connectors on the left, there are labels printed on the board, can you remove the connector and take the pictures so we can see what the labels are?
Never mind about the pictures, shopjimmy has good clear pictures.
Black probe on the CN3 GND, RED probe on 5VSB.
http://www.shopjimmy.com/media/catal...5-0540-top.jpg
Picture provided by SJ.

Ok so, I checked the power board while it was plugged in.. I was getting 5 volts on the 5 volt leads but nothing on the 12 volt leads... Then I went back to check the 5 volts again and found nothing??? I contacted the ebayer who sold it to me and he offered an exchange ... hope the power board is once again bad that way an actually good working one will fix this set.... I'll ask more questions if the replacement board doesn't work.

[budm]

Re: No power on Vizio voj320f1a 32" led tv

OK, the 12v and the 24v power supplies are turn on when it gets the PS_ON signal from the main board, the 5VSB is always on power supply that should be present the minute you apply 120VAC to the power supply board.