Sony VAIO PCG-GR250 User Manual page 35

Using PC Cards
If an exclamation mark (!) appears on the Device Manager tab in the System
Properties dialog box, remove the software driver and then reinstall it.
You may not be able to use some PC Cards or some functions of the PC Card
with this notebook. If you have difficulty inserting a card, check that you are
orienting the card correctly. See the manual that came with your PC Card for
more information on its use.
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