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I have a 13 month old vizio VL470M, this morning when i turned it on, the bottom half of the screen is black...then fades to white...and eventually sits at a grey color. ive tried all the different inputs...the cable and RGB show half screens like i described, and the others just show a blue screen with the bottom half grey and it says "no signal"

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Hi Jackie,
This symptoms indicated of faulty sustain board and/or the main unit board.
First the unit must isolate from loose connection because it will produce same symptoms. It needs to open the back cover and take it apart, pull-out all the cable connectors from the main board, sustain board, power supply board and then re-insert and ensure the connection. Also the affected boards must check from bad solder joints.
If the symptoms still persist after the first steps has been done, the fault is either the sustain board and/or the main unit board. Sustain board is the one process the image came from the main unit board and once failed, same symptoms will be the result. Even if the sustain board is working but if the main unit board has no signal feeding this board same symptom also is the result.
This is not DIY and quite technical because it needs some special test instrument to determine where the fault came from. I would advice you to send it in to isolate the faulty boards.
Also, check if your unit has an extended warranty, if so, avail it because the manufacturer will fix it for free.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Posted on May 19, 2011

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