I bought a couple of receivers [ pansat 2500 & viewsat 2000 ] at a flea market. They both do appear to have hack ka-ka on them. Where & how can I put them back to factory original , as well as update the satellite list . I am giving them to a couple of my brothers , they , as well as I , do enjoy RTV . as well as other sats. . I got some time on my hands , having moved to northern Ontario. Thanks for any help.