14English To clean your pointing deviceTo clean a regular mouse (with rubber ball)1 Open the circular cover underneath the mouse.2 Take out the rubber ball and wipe it with a soft, damp cloth.3 Put the ball back and close 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, refer to the documentationthat 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 done thetroubleshooting tips discussed in the “Frequently-asked questions” section onpage 11• If your problem is not listed in the “Frequently-asked questions” section on page11• If you want to replace or upgrade any of your computer’s internal componentsAsking for technical assistanceFor technical assistance, contact your local dealer or distributor. You mayalso access the Web site (www.acersupport.com) for information on how andwhere to contact the service centers available in your area.