True to their word, well, their final word at least, The Mac Shack did indeed finish repairs yesterday and I was able to pick it up. I was so surprised when I called them and they said it was ready (ummm.... why didn't they call me?) that I asked, "Really? It's really ready? And it's working now?" The guy must have thought I was crazy, but disbelief is the mode when it comes to the iMac. I rushed up there and picked it up, brought it home and let it just sit and run the screensaver for a couple of hours with no problem.