I am having pretty much the same problem. The tuner 2 will not stay locked in and then I get the please check switch screen and it shows something different everytime. Right now it's saying SW64 even though I have a Dish 1000 which should be DPP Twin. Tuner 2 just doesn't want to get more than 119 and it won't let me watch anything in this state. I don't understand why tuner 2 won't work right when it's coming off the same line? Also, I have an 811 that works fine so how could it be the DPP TWin if my other box is getting all channels with no issues? I may have some trees in the way since the growth of spring leaves but I have never had problems like this until I got the 622. If the 811 works then why doesn't the 622? Is it just a POS? No wonder people are buying up digital cable. I just want to watch tv not fool with the dish an hour a day. And why does the check switch have to take so long? There must be a better way.