Slide the PC Card lock into the locked position.
4.
If you connect a security cable to the computer, the PC Card lock will be
blocked, preventing removal or installation of a PC Card. To remove or
install a PC Card, first remove the security cable.
Securing the PC Card lock
After installing the card, refer to the card's documentation and check the
configuration to make sure it is appropriate for your card.
User's Manual
Optional Devices 8-3