First off I know absolutely nothing about sat equip. I bought a brand new H20-600 receiver from some guy off craigslist. I am eventually going to change over to hi def, just not overnight. This reciever is brand new in the box. I disconnect my old (SD-HBH) and hook up the new H20 receiver and I get 86% signal but it will not download the guide data. I call DTV they activate the new card that came with the H20 receiver, tell me to reset, unplug, etc etc but I still can not download guide data. I have No channels on my guide. I have a round dish with a single lnb, could this be the problem? The old receiver works fine with this dish. DTV wants to send someone out but I would rather fix this myself.