Did you jiggle the cable?

So we have been having some difficulties as of late with our DirecTv...my husband has tried everything from repositioning the dish to replacing pieces of it to no avail. The downstairs TV was working fine, but there was no signal to the TV in our bedroom. He was switching cables in the basement and I asked (innocently) if he had checked to see if the cable had fallen out of the box upstairs. He hadn't, and, lo and behold, the cable had fallen out of the wall. TV is back!