HP Compaq NX9000, Reference Manual

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Add-On Devices
Connecting External Devices
Reference Guide 55
To use a port replicator (select models only)
A port replicator provides your notebook with external connections that you can
leave in place whenever you remove the notebook from your desk. Instead of
disconnecting and reconnecting peripheral devices, you can simply undock and dock
the notebook.
CAUTION
Use only the AC adapter included with your notebook (or other approved
adapter that meets the power requirements of the notebook).
Do not use a 60-watt, 3.16-amp adapter, and do not use DC adapter accessories
F1455A and F2297A.
Using the wrong AC adapter could damage the notebook or adapter and cause
data loss, and may void your warranty.
You can dock or undock the notebook in any power state: on, off, Standby, or
Hibernation. Make sure, however, that the notebook is not entering into or resuming
from Standby or Hibernation when you dock or undock, or the notebook could
lock up.
Hint
Before docking or undocking your notebook, save your data and close any
applications associated with external connections that might be affected. Do this as a
precaution against an unlikely docking problem.