"Just replace the Y-Sustain Board and you should be good to go, right? Hold on there, cowboy. Before you go and do that, understand for a moment that Plasma TV's, unlike LCD TV's and LED TV's, is a different type of TV technology and thus, the way it operates is also different. If and when "a part goes out," it works in a domino effect. In other words, when one board goes out, it often times takes out another board with it."
Taken from tvpartsguy.com, there is an advantage if we will replace most of the parts, to have higher success rate than few replaced parts only.