Sony PCG-F250 Manual

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Notes on Use
75
On Maintenance
Make sure to disconnect the power cord before cleaning the 
computer.
Avoid rubbing the LCD screen as this can damage the screen. Use a 
soft, dry cloth to wipe the LCD screen.
Clean the computer with a soft cloth lightly moistened with a mild 
detergent solution. Do not use any type of abrasive pad, scouring 
powder or solvent, such as alcohol or benzine.