Sony PCG-R505JSP - Manual (Page 42)

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Disconnecting the notebook from the docking station
You may disconnect the notebook from the docking station when the notebook is
off or on. However, do not disconnect the notebook from the docking station
while the docking indicator is on, while the notebook is in Standby or Hibernate
mode, or while battery power is low. If you do attempt to disconnect the docking
station in any of these three states, you may lose data or the notebook may
malfunction.
Follow one of the procedures below to disconnect the docking station when the
notebook is off or on.
Disconnecting the docking station when the notebook is off
Before you begin, disconnect all peripheral devices (i.e., i.LINK devices) from
the notebook and the docking station. Also, remove all objects placed on top of
the notebook.
Securing the Notebook to the Docking Station
✍
When the battery is low, turn off the notebook before you disconnect the docking
station.
Firmly press down the two rear corners
of the notebook until it clicks into place.