HP 4150 - OmniBook - PIII 500 MHz User Manual page 17

Using the Dock
5. When you hear two beeps and the undock light flashes, pull the release lever
on the right side of the dock toward the front to eject the OmniBook.
You have 30 seconds to pull the release lever. After 30 seconds, the dock
relocks the OmniBook.
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