I have lost locks in the 40s on both tuners every day on my main dvr and in the 20s on both tuners , on my bedroom dvr. I also had lnb drift messages, check switch messages several times a day and then sometimes I had lost sat signal on the screen on perfectly clear days.
I had to unplug the sat cables and clear the matrix and then change out the cables , diplexors and seperators entirely , so that they would work properly. It hasn't helped the lost locks in the counters menu as they are still high like above , but both dvrs are working now.
When ever I go into the sat dish menu to check a transponder it is defaulted to 105 sat - which I do not have. I have a dish 1000.2 that looks at 119/110/129/61.5. I have to manually turn the sat in the menu to the proper one because it no longer will go there by itself. I consider this the reason for the lost locks. They broke something in with the 401 software that has caused this lost locks problem.