Sony VGC-LT20E User Manual page 174

Why doesn't my computer recognize connected devices?
For some PC Cards, if you alternate between Normal mode and Sleep 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 in the correct orientation. The back of the PC Card should face toward you. 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 74) for more information.
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Troubleshooting