Since the new dryer didn’t fix it, maybe the coax is going bad. Of you have a length of coax, try it first. I wonder if the coax connector at the lnb has some corrosion or the coax insulation is breaking down and enough RFI when the dryer runs is causing signal degradation.I ordered a new dryer. Coax and dryer's been in same place for 30 years. Something must be happening with dryer.