Sony VGN-S4HP/B User Manual page 138

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Precautions
If the computer is brought directly from a cold location to a warm one, moisture may condense inside your computer. In this
case, allow at least one hour before turning on your computer. If any problems occur, unplug your computer and contact VAIO-
Link.
Make sure you disconnect the power cord before cleaning the computer.
To avoid losing data if your computer is damaged, back up your data regularly.