Melody setting (off) is not retained!
I have owned the PN420B450 set for about six months and turned the melody off early on. The other day I noticed it was playing again. Hmmmm. So I went back into the menu, found Melody was set to Medium, and changed it "off" again. Then, when I turn the set off, there is no melody (hooray), but when I turn the set back on again, the melody plays and the setting is back to Medium. Over and over and over. It is not retaining my setting! Any ideas?