Fujitsu LIFEBOOK U7410 Operating Manual page 67

Connecting external devices
You can also switch between the external monitor and the LCD monitor of the
notebook, see chapter "Function keys and key combinations", Page 28.
You can display the same picture on the external monitor and the
notebook LCD monitor simultaneously.
If you wish to operate the monitor via a DVI port, use the optional Port
Replicator available for your notebook.
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