We took in a HP PL4260N 42″ Plasma TV recently. The TV would power on then back of quickly with no display. Some research online revealed that almost all of these TVs failed with the same problem. Knowing we were in luck we researched the information further.
We replaced the IC chip on both the Y Sustain & Z Sustain boards, put it back together and the TV powered right on!
We decided to take this home for further observation. 🙂
Update: This TV served me well up until around 2014 when I upgraded to a Vizio 42″ LED lit TV. It is so much lighter and cooler. Honestly I kind of miss the Plasma for some reason. I ended up selling the HP on craigslist to somebody for 100 bucks.