18Getting StartedUseful InformationTroubleshootingAppendixHandling and Maintenancez Place the computer on a flat stable surface. Do not place the computer upright. If the computer is exposed to anextremely strong impact, it may become inoperable.z Temperature: Operation: 5 °C to 35 °CStorage: -20°C to 60 °CHumidity: Operation: 30% to 80% RH (No condensation)Storage: 30% to 90% RH (No condensation)Even within the above temperature/humidity ranges, using for a long time in an extreme environment will result inthe product deterioration and will shorten the product life.• Be sure to use the computer in an environment with sufficient heat ventilation.- Avoid using the computer on a highly heat retentive surfaces (e.g., rubber pads and blankets). If possible, usethe computer on surfaces that can dissipate heat, such as a steel desk.- Do not cover the computer with towels, keyboard covers, etc., as this prevents heat dissipation.- When using the computer, always keep the display open. (Note, however, that closing the display while the com-puter is in use does not cause generation of heat, ignition, or other malfunctions.)z Do not place the computer in the following areas, otherwise the computer may be damaged.• Near electronic equipment. Image distortion or noise may occur.• Near magnets or in magnetic fields.• In extremely high or low temperature.z As the computer can become hot during operation, keep it away from items that are sensitive to heat.This computer is designed to minimize shock to parts such as the hard disk drive, but no warranty is provided againstany trouble caused by shock. Be extremely careful when handling the computer.z When carrying the computer:• Turn off the computer.• Remove all external devices, cables, cards and other protrud-ing things.• Remove a disc in the CD/DVD drive.• Do not drop or hit the computer against solid objects.• Do not leave the display open.• Do not pick up or hold the computer by the PC card slot or dis-play parts.z When you board an airplane, take the computer with you and never put it in your checkedluggage. When using the computer on airplane, follow the airline’s instructions.z When carrying a spare battery, put it in a plastic bag to protect its terminals.z This computer contains a magnet and magnetic products at the locations circled in the illus-tration at right. Avoid leaving metallic object or magnetic media in contact with these areas.z The touch pad is designed to be used with a finger tip. Do not place any object on its surfaceand do not press down strongly with sharp-pointed or hard objects that may leave marks(e.g., nails, pencils and ball point pens).z Avoid any harmful substances such as oil from getting into the touch pad. The cursor maynot work correctly.z If the computer is being carried in a soft bag with the battery pack removed, avoid undue pressure on the body of thecomputer in a crowded place, etc., as this may result in damage to the LCD. If the computer becomes warm during usagez Check the following• If you are not using a wireless LAN, turn the wireless LAN off.• If the computer becomes warm while the screen saver is displayed, set the screen saver to [Windows Logo].Screen savers that use 3-D images or other complex images increase the CPU utilization rate.• Use recommended RAM module products. Non-recommended RAM modules may not operate properly, and maycause damage to your computer.z Double-click on the desktop and click [High speed], then click [OK].• When you set [High speed], rotation of the cooling fan speeds up and the computer can be cooled down. Note thatthe battery operating time will be shorter.• When you do not frequently use CPU or the rotation noise of the fan bothers you, set [Standard] or [Low speed] asnecessary.Operation EnvironmentHandling Cautions