Eclipse (Fujitsu Ten) AVN units unlocked online — your ESN code, worked out from the six characters on the screen.
ESN stands for Eclipse Security Network: the unit locks itself when the battery is disconnected and asks for its code on startup.
The number you need is on the screen, not on a label — the unit shows a six-character ESN when it locks.
Copy those six characters exactly. They are digits 0–9 and letters A–F — there is no letter O, only the digit zero.
Screen unreadable? Email us a photo of it.
Six characters shown by the unit itself when it asks for its code. Not the serial from the casing label.