1. Screen buffer test: Disconnect the two flex cable between the T-CON board & the screen one by one to see if one cable is disconnect the picture is come on a half a screen or not, if it does, the screen buffer board is bad that is not fixable, you need a new screen.
2. If the buffer test with no result, i will try a new main board.
SOURCE: vizio vw42l, the vizio light turns from ornage to
Does LCD screen backlight come on? If so proceed....
USE:CAUTION WHEN DOING THIS....
Try this if repairing yourself...find power supply, small board with no cover over it...check voltages on output pins/plug/connectors (white plugs) three in a row...
1 Plug has 24Volt supply..1 has 12Volt supply and 1 has 5Volt supply when read to ground (screw that holds board in) if you have these voltages it's a safe bet it's the main control board...I just replaced mine and it fixed a problem like yours.
SOURCE: new lamp turns on flashes 7 times
just replaced lamp and power light goes green then orange and starts to blink 3 times
SOURCE: 26" LCT HDTV Backlight Problem
It can be that the inverter is not getting the 24vdc fromt he power supply module, check for that first, you can check it at either the power supply termninals or at the inverter board. Look to see if the power supply has any leaking/bulging top caps. Modules are easy to replace, fixing it down to component level is not so easy unless you have proper tools an electronics knowledges.
Power supply and Inverter bd: http://www.shopjimmy.com/catalogsearch/result/?q=Vizio+VA26L+
Learn more here:
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net
Testimonial: "Thanks. I swapped out the inverter board for one that I know works, but still have the same proble. I'll look for indications of a bad power supply for the backlight."
SOURCE: my vizio tv has a white screen and then when the
I would suspect either the main board or the t-con board, with the main being the most likely cause. Without an oscilloscope its going to be hard to isolate between the two. Most commonly its the main pcb. The main will have the tuner mounted to it where the rf cable is connected.
Testimonial: "very helpfull thank you great advice and the right advice."
SOURCE: I have a Vizio VO42L that I got for a cheap price
i have the same tv same problem and its a backlight inverter. i am trying to get the back off myself to replace, as we speak
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