Pioneer PDP-LX5090 powers off straight away.

[Dang]

Re: Pioneer PDP-LX5090 powers off straight away.

Photos of said IC.

When switched on, there is a patch of white that glimpses before the Tv powers down, unplugging the power lead to the board will produce an even bigger white patch.

[tom66]

Re: Pioneer PDP-LX5090 powers off straight away.

Hm.
Two possibilities.

1 is bad panel - not good if so.
2 is just that IC bad - maybe able to replace it or salvage matching part.

You can isolate VADR connector for that portion and see if you get partial discharge on the panel.
DO NOT attempt to run the board without that IC installed - the panel may fry if the lower logic voltage is missing!

Testing VADR voltage would lead you to the defective portion (why didn't you give me the voltages as I asked?)