Rock pole back and forth and look for movement at base. If no power is present, broken connection. If you have Ku just swap both ends at the lnbs and rcvr, for test purposes. Then, replace single coax or ribbon cable as needed. This is usually caused by mis-aligned dish.
Some easy tests are to go to the sat.
If there is more sparkle both ways, alignment is ok. Take a visual at that angle. This is usually the problem. Receiver Related Trouble You need to go to your instruction manual for specific problems associated with it. Here is a list of 24 manufacturers and a complete guide on how to use each.