I've got a slimline-3 on my roof co-located with a powered multi-switch, and four lines run down the side of my house and then enter the basement (the other 2 lines drop right through the ridgevent in my attic to get to the upstairs). Anyway, on my HR-20 and HR-21 I started receiving a guide not updating message every few hours, so I ran a signal meter test, and, for the 101, I received a signal on every other entry (e.g., 0 87 0 95 0 93 etc.) That didn't seem right, although I was getting a picture. I ran a system setup, and it failed because it was not receiving a satellite signal. So, I went outside to look at the wiring. I recently had my roof replaced, and when the DTV tech came out, he shortented the cable runs from the roof to the house by taking out the slack and putting in connectors. When I touched one of the 4 connectors, it almost burnt my hand -- it was very hot. I grabbed some wrenches, and when I took the two ends off of the connector, the coax wire was literally burnt to a crisp. The other wires are fine. I've got DTV coming out on Wed to check this out, but anyone have any ideas what could have caused this? A bad ground in the coax? A problem with the power for the multi-switch? I'm just trying to avoid having to have them come out again if they don't figure out the problem. Thanks!