I suddenly began having issues with the 72 satellite. The signal strength is 62 and the signal loss message keeps popping up than the picture returns. I noticed it's going back and forth between locked and unlocked. The 61.5 has a signal strength of 72 and remains locked and pretty steady with no problems. My questions are: Is this happening on 72 due to a weak signal strength? Does the dish need to be realigned? If so, can I realign the dish myself? Do I need any instrument to do this, or do I need to call Dish for a service appt? Thanks.