Hello all. Was told I got a call from Dish today, saying that they needed to schedule a service call to adjust my Dish setup. Said the service would be free. I just noticed that my HD channels are not working (black screen) so I'm assuming it is related to this. I've always done all of my installs & upgrades, and own all of my equipment with the exception of a leased 622. I also carry no maintenance package. My question is, why are they offerring to do this and wt are they going to do? I would just assume continue to do my own work--keeps me sharp. plus I don't have to worry about missing work to wait on a tech. Thanks in advance!