Friend has dead ibook (*yipes*)

[Joe]

Here's his explanation:

"I was tinkering with the terminal in bed one day. I let myself get 
distracted and may have hit a few keys before i decided to put my iBook 
on the table. The next morning it won't start up. (I get the Folder/"?" 
Icon blinking at me)

I managed to start up with a backup Zipdisk and Firewire Drive. My 
Normal HD isn't showing up. At all. not in disk warrior, or norton, or 
First Aid, or even Apple System Profiler. IT doesn't have an ATA drive 
listed.

Could it have been.. unplugged? Any ideas as to what happened to my my 
dear ibook?"

Can you help him?

TIA