Question about Vizio GV42L 42 in. LCD Television

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I have a 42 inch Vizio LCD 1080P Gallevia model flat screen. It's coming up in December of 2013 on being four years old. After turning on the TV - ten (10 - 15 minutes) or so, later three-quarters of the screen goes dark, then after a little while, the screen comes back to normal. Also, the screen goes dark from side to side - then will resume back to normal. After doing these two things alternatively, the TV goes back to completely "normal" overall...This just began happening in the last few days - it's Wednesday, 10/16...Does anyone have any ideas what is possibly wrong? Thank you...

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  • 224 Answers

Sounds like the back light is going out or a connection to the back light has loosened of the years

Posted on Oct 17, 2013

Testimonial: "Hello Kelly: I will get a friend to look at the "back light" or the aformentioned connection. I appreciate the suggest potential problem. If it's a back light going out, and dying a slow death, what does it cost to replace? Thank you! Best regards, Steve"

  • 3 more comments 
  • Kelly Oct 17, 2013

    That would depend on your local repair shop, or if you were doing it yourself, the parts can be found online and can range from $25 to $200 depending on who and where you purchase them from.

  • Steve Fischer
    Steve Fischer Oct 20, 2013

    Hello Kelly: What do you think of two TV flat screen repair guys having completely different opinions on my Vizio Gallevia current problem? One says, "it's a bad inverter module - $150.00 or so to fix.

  • Steve Fischer
    Steve Fischer Oct 20, 2013

    Hello Kelly: The second TV flat screen repair guy says, "it a bad LCD screen internally, and not fixable/cost effective, or something to that effect...

  • Steve Fischer
    Steve Fischer Oct 20, 2013

    Hello Kelly: So in essence neither TV flat screen thought it was a loose back light connection, or a bad back light per se...

  • Kelly Oct 20, 2013

    It is always possible to get different opinions on any issue, however without testing the item, all opinions are just opinions based on the symptoms that are described, but it's not a bad LCD since it still works, it's not a bad inverter since the issue is as you described, it's either a cold soldier joint or the back light in my opinion

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petraman7
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SOURCE: vizio 42 lcd gets large dark spot. it will go away

HI...
It's probably a loose flex cable inside. Look on the web and find someone near you

Have a service tech check it inside for you

Posted on Apr 22, 2010

budmrtn
  • 11361 Answers

SOURCE: every ten to fifteen minutes the screen goes blank

It can be that the 12/24vdc power supply go into shut down mode due to short circuits in the backlight inverter board. You need to check the output voltages of the power supply with and without the backlight inverter board connected to the power supply.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

Posted on Aug 11, 2010

pastorey
  • 47 Answers

SOURCE: Vizio 46" Gallevia Flat Screen

any display in the corners of channel number av etc ?? if you turn the volume up and down does that show on the display if not likely to be a dead panel

Posted on Dec 09, 2010

  • 1 Answer

SOURCE: My Vizio LCD TV screen fades to dark. Sound stays on.

I w having this same issue when watching a Blu-Ray disc. I found it to be dependent upon what picture mode the TV was set to. By this I mean certain picture modes would cause the TV to dim during dark scenes of a movie. Changing the picture mode helped a lot.

Posted on May 26, 2011

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