So, I was setting up my new computer and have done something terrible to it. Here's the story: As I was customizing this and that, I came upon a feature that allowed me to have the on/off button put the computer into sleep mode instead of turning it off. For some reason, this appealed to me, and I went ahead and made the change. A bit later, when I went to eject a DVD, I hit the on/off button by mistake. And now I can't get the computer to wake up, because until one makes the changes that allow this to be done with the mouse and/or the keyboard, the only way to rouse the thing is by powering it up--which can't be done because the on/off button now puts it to sleep. Since I also couldn't turn the computer off, I eventually did so by unplugging it (an action that tech support confirmed was correct to try). Now, of course, it can't boot, because the on/off button just tells it to sleep.
Any ideas on how to yank my poor computer from the endless Catch-22 loop in which it is caught?
Note 1: I don't have a backup disk. The computer did not come with one, and when I tried to make one, as is strongly urged, the DVD drive would not recognize the DVD-RAMS I have (Panasonic LM-AF120LU5, which should be fine). This was disconcerting even before the other crisis blew up, because it suggested there was something wrong with the drive.
Note 2: The computer isn't even connected to the Internet yet, so remote fiddling isn't possible.