Thaks Ivan! but... i refer to the SVI-
738 X'PRESS, the portable one, not the
728.

It needs another plug, with one pin only (standard). I've searched it on the web, but I don't find the voltage anywhere! and in the same computer don't tell it!. (sorry, my english is terrible) I think it's possible that runs with 9V or 12V DC but on the computer's hardware, under the plug only appears the symbol " ~ "...

seems like AC...
Thanks newly and sorry