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Vizio VT470M 47 in. TV Questions & Answers
Vizio VT470M no picture, no sound, no backlight. Power supply board looks good all voltages appear correct.
Im having similar problem and with my limited knowledge of lcd tvs and the voltages ALL being good except the pwr on or sw on voltage from the main board to the power supply which tells it to switch everything on Im guessing that something is going wrong on the main board. In the condition where it freezes it (the power on V) which switches everything on i get varied voltages such as 2.5 or 3 or (the normal 5v) and then when nothing powers up (blank screen) i read 0v on pwr on voltage but all my other voltages are corect (24v to inverter, 12 v to main board, 5v, etc.) Im guessing from researching this is that there is in improper voltage somewhere in the main board circuit. I have been unable to find it so i may order another board and post back.
Where can i get a cheap circuit board for my VIZIO VT470M
There is no cheap boards. A particular model or TV will have the same type of board, and cost for it will be almost same to all spare part sites.
Visit the site named 'Electro-help' for more
details. Click this link.
View it in 'Flip
card' option, which can be selected from the drop down box menu by the
[Sidebar] tag, at the top left corner of the display window. It will make search easy. Some times, the ads attached with each
posts, both at the right and bottom, might help you to find the availability of
spare parts. There are more than 850
posts to different brand TVs now.
My vizio 47 in. tv
I am pleased you found my flash light test useful. You have a ballast or back light problem. Probably just the ballast unit, so well worth repairing as the expensive bit is OK.
Check the ballast unit before seeking lamps.
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