Question about Vizio L32 32 in. LCD HDTV

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Black screen - Vizio L32 32 in. LCD HDTV

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There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both - in your case it's most likely the inverter board.
First check for fusible links on the inverter. They may be tiny white rectangular boxes, flat and green or they may be flat black 0 ohm resistors (will have a 0 printed on the surface)

Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.

If you are handy with a soldering iron and can identify the power supply and inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).

Most of the caps that go are 10V 1000uF or 3300uF.

I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.
http://www.youtube.com/watch?v=Mm51C_RDIZE
http://www.youtube.com/watch?v=BNHHrgX_6cs&feature=related
http://www.youtube.com/watch?v=8l0AUj8QUkg&NR=1&feature=fvwp
http://www.youtube.com/watch?v=Y7b_nTaZYcU&feature=related

As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.

Posted on Mar 25, 2011

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