i have the same issue as the Op i just bought a dynex DX-L40-10A hdtv and i can excess digital channels like cbs, tsn, abc, nbc, fox, W, sun tv, here is the codes
rf89.5 cbs digital
rf89.9 abc digital
rf89.11 NBC""
rf89.24 fox
rf90.33 W
rf99.96 MTV
rf99.94 MMM
rf102.118 game tv
rf89.10-CH
rf88.59 tsn
rf87.8 SUN tv
also 89.1 and 89.10, this channels are sometimes Mpix, rogers of demand, or cogeco on demand or family on demand, and they show the same movie all the time, and whats wierd is that sometimes it rewinds about 30 sec-2 minutes, its like someone is controlling it
anyone know what 81.9 and 89.10 are, and where i can get a guide for the other channels if there is one, since the channels just say rf81-9 when i use the built in guide