Question about Vizio GV46L 46 in. LCD Television

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Faulty power supply unit?

My Vizio GV46L after one year stopped working and it's not under warranty now. It seems like it doesn't get power. I already tried switching different outlets and power cords. Could it be a faulty internal power supply unit? Does anyone know when I can purchase one? Does anyone perhaps know how to fix it? Thanks.

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  • Anonymous Feb 24, 2009

    I have a Vizio GV46L which is about a year and half old. It just went dead without any warning. I have changed outlets, plugs it is still dead! Help

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This unit uses one of 2 power supplys the parts list is here https://www.vancebaldwin.com/shop/research_new/VIZ/GV46LHDTV10A.pdf
you can purchase the parts at www.vancebaldwin.com. but before you order the power supply check the voltages on the power supply you should have 24v, 12v, 3.3v, and 5v if you have all of these voltages then you may have a main board or panel problem.

Posted on Apr 17, 2008

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You can contact the manufacture to purchase the power supply module.

However, there are other boards in the set that can easily cause the power supply failure because something went defective. It is also possible that the power supply is not defective, but it is in protect mode because of a failure on another board, or in some other device in the set.

The tech would follow procedure from the service manual using the proper instrumentation and diagnostics to determine the defective board(s). Then he would replace the necessary modules and or parts to get the set working again.

In the end if you try fixing this yourself, you can end up spending a few hundred dollars on a power supply and only find that it blows again or goes in to protect mode because the original fault was not determined and corrected.


Jerry G.

Posted on Apr 17, 2008

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The reason the tv is turning itself off, because most TVs have a "Protection Mode" that turns the unit off when it detects a failed part inside the tv.
The most likely the tv has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
Being that the TV is under a year old, it should be still under manufacture warranty. Last thing you want do is void the warranty by opening up the TV. Here's some info to get you started on the warranty:
http://www.vizio.com/support.aspx?id=1588

If it not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

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