Here are the numbers I found on my replacement power supply board. LJ4104217A I spent a lot of time and money on this plasma TV only to learn what not to do in the future. I heard people say it's best to change both buffer boards with the Y-sustain board but I thought I knew better. Apparently not in the case of this Samsung TV. Oh well at least I learned something I could share with others. If your an advanced technician and would like to learn more about Plasma TV repair here is a link to an ebook on the subject. http://davestv.damon789pla.click2sell.eu Please take note Damons Ebook is pretty advanced info although his book does have some sections that show pictures of symptoms and their likely causes.