Shutting off a receiver helps with this problem, so does holding down the power button for 5 seconds and letting go when it goes off, this does a reset. Its also possible if not probable that your dish is out of tune and you will get this same issue also.
Take your remote and hit the following buttons in this order.
Menue, 6, 1, 1, select the 119 satellite and then change the transponder to 11 and see what the signal strength is, if its below %80 then this can lead to your problem specialy if its at %60 or less. If this is the case then you need to have the dish retuned wich is a service call.