This is the most unheard of thing I have ever heard of. You need to read carefully. You have three receivers: A, B, and C. You have two C-Band dishes: 1 and 2. Both have the same LNB on them. Both dishes are set to 103. Hook up receiver A on dish 2, works great. Remove it and hook up receiver B on dish 2, works great. Remove it and hook up receiver C on dish 2, will not show more than 15 for signal. But move it over to dish 1 and it works great! How can a receiver decide it will not work on a dish but it will work on a different one. Again, same LNB. This just does not add up. Yes, the setting have been triple checked.