HP Compaq tc1100 Reference Manual page 17

Docking and Undocking the Tablet PC
With the Keyboard Attached
The optional keyboard includes a docking connector pass-through
so that the tablet PC can be docked with the keyboard attached.
Before docking with the keyboard attached, close the tablet PC
and keyboard, then slide the keyboard latch to the right to lock
them together.
Securing the keyboard to the tablet PC
Docking and undocking the tablet PC with the keyboard attached
and opened is not supported.
If you want to use a keyboard and pointing device while the tablet
PC is docked, connect an external USB keyboard and mouse to
the Docking Station. See the
Keyboard Attached"
information.
2–4
"Docking the Tablet PC with the
section later in this chapter for more
Reference Guide