Except for the last sentence, you could get exactly this with a single LNB. The sat receiver cannot prove that the multiswitch worked when the receiver sent up 13 or 17 volts, or did or did not send up tone. Now, if the guide information that it has tells it there should be channels on some transponder and there are none, you will get a message.

But think about this: if you hook up an old single-LNB dish to an HD receiver and tell the receiver to check signal strength on, say, tranny 22, it will tell you there is good signal on 101, then on 119 (or 110, I forget which one uses tranny 22). Even if there is only signal coming from the one LNB pointed at 101.

So check your connections, swap out the multiswitch. Heck, it is even possible that 22 kHz is not going up the line so the multiswitch is working fine but the sat is not giving it signal to respond to!