ChapterChapter 1010TroubleshootingBefore contacting an authorized service center at 1-800-853-8883, carry out the following simple checks.They may save you the time and expense of an unnecessary service call.No displayIs the power supply connected?Are the batteries installed properly?Do the batteries need replacing?Difficult or no response from the mouseIs the ball of the mouse and mouse pad clean and free from dust?Is the mouse connected correctly?Black-out screen or abnormal displayDisconnect the power supply by removing batteries or disconnecting the adaptor for at least10 seconds before connecting the power supply again.Under the environment with Fast Transient, the unit may malfunction and require user to reset the unitDeveloping learning products is a responsibility that we take very seriously.We make every effort to ensure the accuracy and appropriateness of the information that forms the value of ourproducts. However, errors can sometimes occur. It is important for you to know that we stand behind ourproducts and we encourage you to call our Consumer Services Department at 1-800-853-8883 with any problemsand/or suggestions that you might have. Our service representative will be happy to help you.Conforms to safety requirements of ASTM F963, EN71 Parts 1,2 and 3 and EN50088.In an effort to continually improve our products, the actual screen display on product may differ slightly from thediagrams shown.