HP OmniBook 3100 Notebook PC - Manual (Page 7)

Using OmniBook Plug-In Modules
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Replacing a Plug-In Accessory Module
-QTSVXERX Shut down the OmniBook before removing or inserting the plug-in module using the
Start menu, or press and hold the blue power button until the display shuts down.
This is not necessary if you are removing a second battery from the plug-in module
bay and inserting another battery.
To replace a plug-in module
1. From the Start menu, shut down Windows (this is not necessary if you are
removing a battery from the plug-in module bay and inserting another battery).
2. Slide the safety latch for the plug-in slot into its recess.
3. Slide and hold the release latch, then pull out the module, as shown.