This was exactly what I have been telling people over at the PSR Groups. From what Don says it may be that the chips HAVE been soldered directly to the board, rather than inserted into sockets, which cost a few cents. If that is the case it is not easy to remove and replace these chips. UNLESS YOU ABSOLUTELY MUST HAVE THIS DONE I WOULD NOT RECOMMEND GETTING THE OS UPDATE! Even if Yamaha paid for the update repair AND shipping I wouldn't do it. You will not have your PSR for quite a long time. The PSR may get damaged in the 2x shipping (This happened to me and was a real pain, even though Yamaha took care of it without cost to me). FOLKS IT SIMPLY AINT WORTH IT AND IF IT AINT BROKE DON'T FIX IT!