I believe I have a standard LNB there are 4 coax connectors at the LNB. We are running 2 coax cable from the LNB to the H24 location. (Only one is being used since it is a H24)
BeerStalker: There is BBC connected to each receiver.
There is not a multi switch at this time (Direct run from LNB to receiver)
The packing slip for the dish and receiver says:
KaKu Slimline dish W/SL5 LNB
So one coax is going from LNB output directly to one receiver, and the second coax is going from a second LNB output directly to the second receiver. With only one receiver connected, everything is okay, but with both receivers connected you are losing odd transponders. You have swapped the two receivers, and the same symptoms remain. Did I get all that correct?
Make sure both coax are actually going all the way to the connections on the LNB, and that someone hasn't actually taken one of the outputs and run it through a splitter.
Then, move the two coax to the other two outputs on the LNB and see if the symptoms remain the same or change. You could actually go through all combinations of the four outputs (Rcvr 1 to output 1 & Rcvr 2 to output 2, Rcvr 1 to output 1 and rcvr 2 to output 3, rcvr 1 to output 1 and rcvr 2 to output 4, rcvr 1 to output 2 & rcvr 2 to output 3, 2 and 4, then 3 & 4).
Also, try the two receivers tuned to the same channel, and try them tuned to different channels. Use the test channels in the 9500 series. Put one receiver on channel 9501 and the other on 9502, then work your way through all of those combinations.