IBM ILC200 - Manual (Page 47)

Computer Key command to
activate port Key command to
deactivate port
Zeos ** Ctrl-Shift-D Ctrl-Shift-D
FN-F1 FN-F1
* These manufacturers have models that automatically send video to the
external video port when some type of display device is attached.
** These manufacturers offer more than one key command depending on the
computer model.
Appendix B. Portable and mobile computer activation B-5