HP OmniBook 900 - Monitoring Battery Power; To install APM for Windows NT 4.0

Installing Accessories
Using the Module Bay Adapter
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2. If the plug-in module is secured, remove the PCI board door and slide the
module security latch to the unlocked position, then reinstall the PCI board
door.
3. Press the eject button and remove the plug-in module from the dock.
To install a plug-in module
1. From the Start menu, shut down the OmniBook,
–or–
undock the OmniBook.