The downside to such replacements is that if you guessed wrong, you get to keep such boards.
The mainboard on my TV (Samsung LCD TV Model LN46A550P3F XZA)needs to be replaced and the Part# is BN97-02643A. In searching different websites, I can't find this Part#. The search always redirects to several different Part #'s starting with BN94. There are so many different ones cross referenced, how do I know which (if any) of these will work as a replacement.