Forums:
Sorry if this accidentally got posted to the expert side. I have a Toshiba 42HP83 plasma TV. It now exhibits the following,
apparently common, problem where the screen starts up normally, starts
to pixelate until it goes virtually black with a red horizontal line,
and remains like this for a period of time (up to an hour recently) and
then comes on full and normal like nothing was wrong. Could not get
anyone to fix it properly (multiple boards were replaced with no
effect). Now I see that one possible solution is replacing the Y-Main