I'm posting this information for those like me who own a ReplayTV 5000 series box and a Vizio TV (popular at Costco). I had a hard time figuring out how to program the ReplayTV remote control to turn on the TV set - the codes were not listed in any of the ReplayTV documentation or knowledgebase.
I went to the Vizio web site, and they made some suggestions for 3, 4, and 5-digit remote control units, including:
For me, the 4-digit code 0030 worked for my SonicBlue ReplayTV remote control.
Hope this info helps.