Acer TravelMate 660 series User Manual page 6

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3 Use a soft cloth moistened with water. Do not use liquid or aerosol
cleaners.
4 To clean the display screen, use an LCD cleaning kit.
If any of the following occurs:
• The computer has been dropped or the body has been damaged.
• Liquid has been spilled into the product.
• The computer does not operate normally.
Please refer to "Troubleshooting my computer" on page 55.