This morning I was awakened by the sound of my phone ringing.
Fortunately, I'd seen this before. Sometimes, power supplies can do weird things, especially on ATX boxes. You just unplug it for a while and let it cool and that usually fixes it. I told her this and she said that she'd call me back after she tried it. "I just put it to sleep last night," she added, "and this morning it won't wake up when I hit the button."
Of course this changed everything. Sleep mode never works right. On the other hand, the fix is the same thing. I hung up and went back to sleep.
When she called back, she said that it was working fine now. So I scored some brownie points there, I guess. It's too bad that I probably won't ever get a chance to redeem them for brownies :-) It's nice when things are so easy.