None of them gave me a black light; the screen goes either bright white or total black. The command that makes it go black was o f2 4, so I used o f2 0 to turn it off, right?
Unplugged to the USB, the screen goes white light, and total black if I plug it to the USB.
I also noticed it used to need to be switched on to be recognized as a flash disk, but now after using the s1fiveieo, it is recognized even if it is switched off.
Does this mean anything important?