15Useful I n f ormationOperation environmentl Place the computer on a flat stable surface not subject to shock, vibration, and danger of dropping. Do not placethe computer upright or turn it over. If the computer is exposed to an extremely strong impact, it may become dam-aged.l Operating environmentTemperature: Operation : 5 °C to 35 °C {41 °F to 95 °F}Storage : -20 °C to 60 °C {-4 °F to 140 °F}Humidity: Operation : 30% to 80% RH (No condensation)Storage : 30% to 90% RH (No condensation)Even within the above temperature/humidity ranges, operation for a long time in extreme environments, smokingnearby, or operation in places where oil is used or where there is a lot of dust will result in the product deteriorationand will shorten the product life.l Do not place the computer in the following areas, otherwise the computer may be damaged. Near electronic equipment. Image distortion or noise may occur. In extremely high or low temperature.l As the computer can become hot during operation, keep it away from items that are sensitive to heat.Handling cautionsThis computer is designed to minimize shock to parts such as the LCD and the flash memory drive, but no warranty isprovided against any trouble caused by shock. Be extremely careful when handling the computer.l When carrying the computer: Turn off the computer. Remove all external devices, cables, Smart Cards and other protruding objects. Do not drop or hit the computer against solid objects. Do not grip the display part.l When you board an airplane, take the computer with you and never put it in your checked luggage. When using thecomputer on airplane, follow the airline’s instructions.l Avoid any harmful substances such as oil from getting into the touchscreen. The pointer may not work correctly.l Be careful not to get injured by dropping or getting hit when carrying the computer.n When the battery indicator does not light onThe battery indicator may not light on even if the AC adaptor is correctly connected to the computer, due to the follow-ing reasons.l The AC adaptor’s protection function may be working. In this case, pull out the AC cord and wait for more than1 minute before reconnecting the AC cord.n When using peripheral devicesFollow these instructions and the Reference Manual to avoid any damage to the devices. Carefully read the instructionmanuals of the peripheral devices.l Use the peripheral devices conforming to the computer’s specifications.l Connect to the connectors in the correct direction.l If it is hard to insert, do not try forcibly but check the connector’s shape, direction, alignment of pins, etc.l If screws are included, fasten them securely.l Remove the cables when you carry the computer. Do not pull the cables forcibly.n Preventing your computer from unauthorized use via wireless LAN/Bluetooth for model with wireless LAN/Bluetooth>l Before using wireless LAN/Bluetooth, make the appropriate security settings such as data encryption.Handling and Maintenance