Over the past few weeks we have been losing several HD channels for a few minutes to a few hours at a time on the 129 satellite. The weather has been clear and sunny and there are no trees blocking the satellite, yet almost all transponders are showing no more than 20 strength and one shows no more than 14 (getting as low as 4; the channels on this one are the ones we're losing). We're wired for three hoppers and two joeys using two DP44 switches. Does anyone have an idea as to what could be wrong?