This is going to be difficult for y'all to help because 1) I don't know the exact setup/hardware and 2) I'm Directv illiterate 3) You will need to think how an MDU installer would setup the building. Hopefully that doesn't deter some of you smarter ones. Here's the situation. I moved FROM an apt with my own slimline5 and hr22-100 TO a condo. The 16-unit condo is maintained by a subcontractor and it has 2 satellites on the roof (I assume slimline5's because that's what is says during setup but I don't have access to the roof). It goes to a distribution panel which is a complete insanity of wires. There is at least one SWM, a PI, a couple multi-switches, and many splitters. (yes, I do realize this isn't very helpful). I have 2 co-ax running to my apt (1 upstairs, 1 downstairs) and i have traced them back to being plugged in to one of the multi-switches so I don't think I have anything to do with the SWM. Problem #1 When I have the co-ax plugged into Sat1, it boots up, downloads guide data, but I cannot view any stations. If I do a "run test" in system setup I get an Error Code 42-599. HOWEVER, if I now unplug from Sat1 and move co-ax to Sat2, I can view SD stations. However, after a certain amount of time it will say that it is "unable to download guide data for last hour, please contact Directv" However, if I have the cable plugged in to Sat2 and reset the box, i get a "771 Error Searching for Signal" then it tries to "Acquiring Guide Data..." but never does and I can never view SD channels. Problem #2 Again, my first step is to get only 1 tuner working, then getting both tuners working. I have tried to diplex each coax coming from the multi switch, then use a separator to go into both Sat1 and Sat2. This allows the receiver to boot up, download info, and get to SD channels. I get the same error code when I run tests (42-599). Problem #3 I'm not getting any HD. I have to tell the receiver to "Hide all HD channels" so that I can view the SD channels. I tried hooking up BBCs but that didn't help. Anyways, I feel like I need to solve Problem #1 first, then figure out the other 2 problems. Can anyone provide any direction?