Did you follow Bills advise to allow the travler to re aquire the signal? Do that first. LNB is the device on the end of the arm that recieves the incoming signal. The dish simply is a radiator. It only focuses the signal to one location, the LNB which then sends the signal down via a coax cable to the receiver. Dead LNB no signal, bad coax cable, no signal. Mis aligned antennq, no signal. You receiver is fine. It is not getting a signal. Power your travler off, let it park and then turn it back on and allow it to domits search finction and report back how it goes.