Go to samsungparts.com or encompass with your complete model number, including any suffixes. You may also need to know the chassis, version, or type number. Do not assume that getting the right board is trivial. Make sure that it is the right part number for YOUR model and version.
This is one of the problems with Samsung. They have so many production changes that they do sometime specify parts by the suffix or by the model or by the version or by the name of the series of sets. You have to check. It appears that they have subbed the same part number for several versions now, which is why you often have to make changes in the service mode to get them to work properly.