It's lnbf failure, if it was bad cable then he would have problems on the other sats aswell, if it was a bad mount then repeat on all sats, satellite specific is almost always lnbf and or switch failure and sometimes receiver wich we can rule out here.
Go to the dish if you can touch it, take a phillips screw driver and on the bottom side you should find one or two screws to remove from the bottom only, theres a third that has a nut on the bottom that you should leave alone. Take the two out and carefully pull the lnbf out and check the cable connection on the one thats on the left ( east) side of the cluster, if its loose then tighten it and do the same for all of them, if not then put it back together and call dish for a trouble call for a failing lnbf.
Go to the dish if you can touch it, take a phillips screw driver and on the bottom side you should find one or two screws to remove from the bottom only, theres a third that has a nut on the bottom that you should leave alone. Take the two out and carefully pull the lnbf out and check the cable connection on the one thats on the left ( east) side of the cluster, if its loose then tighten it and do the same for all of them, if not then put it back together and call dish for a trouble call for a failing lnbf.