I have a WS-65807 that has been diagnosed with a bad signal board for which there are no available replacements. I did not get any more detail on the board other than that it was bad. I found a WS-55807 on craigslist and picked it up pretty cheap thinking I could change out the signal boards since they are the same part numbers. Now that it comes to it, I am concerned how the 65" signal board went bad to start with. I would hate to swap it out just to have the new board get smoked when I turn on the power. Has this swap been done before? What kind of things should I look out for?