English7• When unplugging the power cord, do not pull on the cord itself but pullon the plug.• The total ampere rating of the equipment plugged in should not exceedthe ampere rating of the cord if you are using an extension cord. Also,the total current rating of all equipment plugged into a single walloutlet should not exceed the fuse rating.Cleaning and servicingTo clean your computer and keyboard1 Turn off the computer and unplug the power cord.2 Use a soft cloth moistened with water and gently wipe the exterior ofthe computer and the keyboard. Do not use liquid or aerosol cleaners.To clean your pointing deviceTo clean a regular mouse (with rubber ball)1 Open the circular cover at the base of the mouse.2 Take out the rubber ball and wipe it with a soft, damp cloth.3 Put the ball back and replace the cover.To clean an optical mouseFor users of an optical mouse, refer to the documentation that came withyour mouse for maintenance instructions.To clean your monitorMake sure that you keep your screen clean. For cleaning instructions, referto the documentation that came with your monitor.When to contact a service technician• If you dropped and damaged the computer• If liquid has been spilled into the computer• If the computer is not operating normally• If a computer problem persists even after you have checked and appliedthe troubleshooting tips discussed in the "Frequently asked questions"section on page 5• If your problem is not listed in the "Frequently asked questions" sectionon page 5