I seem to be havin g a problem with my switch. It shows up mainly on my 510 receiver, although it is beginning to give my 811 problems also. I keep getting an error that says to run the "Check Switch" utility. When I do, most of the time it completes fine but not always. The error always shows up when tuned to Sat 110. The 811 will give an error about cable runs of over 100', which this is not. It is 100' exactly. The 510 shows that the switch is a 44 but occasionally will show something else. It even came up as a 3 Sat switch Saturday night. What do I need to fix this? I am guessing that this switch is the thing where the 2 cables from the LMB become 1 before going to the receivers. The LMB is for 4 receivers although I only have 3. I never have a problem on the old receiver, just the 510 and 811. I had never had a switch problem at all before. last fall when I had a 6000 and the 510 installed, the guy changed the switches and LMB. I have a Dish500. What do I need to do? This has passed from occasional to annoying.