@adodo: You need to enable Private Messaging. This is in the "Edit Options" of the control panel. If this isn't there, it has to be added somehow. You can try posting in
https://www.mobileread.com/forums/sh...d.php?t=319819 to ask it to be enabled, or contact a moderator.
But, have you charged it? And have you tried turning it on when plugged in? The blue light coming on and the going off can be a sign of no charge, or a dead battery.