Answer:
You'll need to hold down/click<em> </em>f11 and fn at the same time.
If not that, try ctrl + shift + f5.
I can guarantee the first works; not too sure about the second.
Explanation:
Well, it's hotkeys, so...
<em>EDIT: The f5 command does nothing related to full screen, my bad.</em>
I believe it is an optical storage system that uses lasers to read data.
