I had asked about my Direct TV problem of every other channel showing zero on signal strength.It was stated a bad connection was probably the culprit.Today for the first time in a week the outside temperature is above freezing and about an hour ago all stations are showing great signal strength...

I have direct tv with 4 boxes. In a somewhat rural blocked signal area.About half the channels(always the same ones) not coming in on some days and the check of signal strength reveals zero for every other channel.Other times all come in well,and HD channels all working on HD receiver.What's up?