I got email from my girl friend today:
"i have a little problem :(((
with the laptop...

i put in a CD...
but there was a little piece of paper stick to it, at least it seemed so, and it sucked it in already when i noticed.

the CD came out, but the paper remained inside... i think..."

After I got home I took a look. It was pretty hard to see inside to the optical drive but I thought I saw a piece of paper. Unfortunately the hole of the optical drive is small and it is protected with some kind of fabric strips so I could not simply pull it out.

Disassembling 12" PowerBook is considered to be demanding and assembling is nearly impossible for mortals. And the optical drive requires almost every other component to be removed. Time to figure out something else.

The solution turned out to be the vacuum cleaner. In order to find out what it is sucking out from the laptop I put a thin sock around the end of the hose. And actually I managed to get only that piece of paper out and everything works again.