Sony keeps the same codes for a class of equipment indefinitely.  The only new codes are for previously non-existent functions.  The link posted above should provide code for the majority of functions.  Sony projectors have used Sony 15 device 84, and Sony 20, device 26.42.  Recently manufactured projectors also have some additional new codes on 26.39.  

Until you can make the functions like Power Toggle work, a reasonable presumption is that there is some error in entering the Pronto Hex.