5To clean your mouse1 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.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 anddone the troubleshooting tips discussed in the “Frequently askedquestions” section on page 75• If your problem is not listed in the “Frequently asked questions”section on page 75• If you want to replace or upgrade any of your computer's internalcomponentsAsking for technical assistanceFor technical assistance, contact your local dealer or distributor. Youmay also access the Acer Web site at http://www.acer.com/ forinformation on how and where to contact the service centers availablein your area.Accessing your online guideFor on-the-go help information about your computer, refer to theVeriton 5200 series Online guide. To access the online guide, simplydouble-click on the Veriton 5200 series Online icon on your Windowsdesktop.