Sony Vaio VGN-AR300 Series User Manual page 209

Why doesn't my computer recognize attached devices?
For some PC Cards, if you alternate between Normal mode and Sleep or Hibernate mode while the card is inserted into the
PC Card slot, your computer may not recognize the PC Card or the connected device. Restart the computer.
Why can't I insert my PC Card?
Make sure you are inserting the card correctly. See Inserting a PC Card
You may not be able to use some PC Cards or some functions of the PC Card on your computer. See the manual that
came with your PC Card for more information.
(page 68) for more information.
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Troubleshooting