VP422 plasma will not hold power If i plug it in the yellow Vizio lights up then fades out

42" Vizio TV flickering strobing easy way to repair VW42L ...

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42" Vizio TV flickering strobing easy way to repair VW42L HDTV10A LCD TV ... EASY How to Fix Samsung LCD TV Flashing Flickering Screen!Missing: vp422hdtv10a ‎snow

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Apr 15, 2009 - I have a vizio p42hdtv10A that just went into a black screen. .... I have a Vizio VP422 HDTV10A that will not stay on or show a picture. I removed ... Vizio vp422 hdtv10a
Dec 20, 2011
Plasma & LCD TV Forum
May 13, 2011
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bad circuit board

The power on is usually 3.3vdc, but on some sets it's at 0v to turn on the set, and 5v when the set is off. Your power supply maybe ground activated. If you replaced the main board, then the power supply is your problem

I would double check the capacitors on the power supply board. Make sure you don't have any that are bulged at the tops. Secondly, when you try and turn it on, does the orange light flash at all??

The main power fuse is not to far from where the power connector plugs into the power board. If this fuse is constantly blowing, you have a dead short on your power supply board.

needs new mother board

The main power supply , which is somewhat active even when the set is 'off,' is damaged.
With luck (a lot of it) it may have gotten enough spike to cause one of the (few) protective parts to fail, rather than serious damage having resulted.
Leave the set upplugged for at least hours (overnight is better) to allow certain components to discharge and remove the back panel from the set. Look for obvious signs of burning/damage and possibley a fuse.
There is a part that limits peak voltages coming in from the AC line that often explodes when hit hard; if not in pieces, it is a disk-like device, mounted vertically with leads coming from the sides or bottom of the disk. If you see only two wires sticking up and going nowhere, that is where the part once was and the damage is probably severe enough to make replacement of the supply necessary and this may not be the end of the repair.
Sorry -

Surround Sound to 8 or 9 8 is best
DVD to HDMI 1
Direct TV to 10
If you have these connections on your peripherals, this is recommended..

Try to unplug the power to the TV for about a minute and plug it back in. Is the Vizio LED light on?