I've tried the codes listed in setup and a bunch from D*'s site. Could someone give me a clue. I can't control the volume from an RC64R remote on the Sanyo Model DP422647. All the Sanyo's in Wal-Mart use the same remote codes from a 19" up to the 42" (all LCD HDTVs), so the code shouldn't be a secret. Help, please!