I'm afraid I don't have any words of wisdom for you. The Sharp TV only has the one code, 535, and the setup procedure is simple and you have done it before, so that is probably not it.
If you are sure you have followed the procedure correctly, and still can't get it to work, the best thing I can suggest is to post your problem in this forum, where they are more familiar with receivers and their remotes.
[Link: agoraquest.com]