Hello everybody! I want to share my different problem and solution with this model B17-1, in case somebody else is dealling with it:
The monitor was starting, showing the Fujitsu Seimens logo, and staying block on that image; only on/off button worked.
The problem was one of the buttons from the control board that was in short when not pushed. It was a very strange situation.

So I just removed that button and the monitor started normally.
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