Computer Basics - 11• the product has been dropped or the case has been damaged• the product exhibits a distinct change in performance, indicating aneed for service• the product does not operate normally after following theoperating instructionsNote: Adjust only those controls that are covered by the operatinginstructions, since improper adjustment of other controls mayresult in damage and will often require extensive work by aqualified technician to restore the product to normal condition.Health precautions• The computer and accessories may contain small parts. Keep themout of the reach of small children.• If you work or play for hours at a time, then make sure you takeregular breaks. Look away from the computer's screen once in awhile. Do not use your computer if you are tired.• Arrange your computer so that you can work in a natural andrelaxed position. Place items that you use frequently within easyreach.• Position your computer directly in front of you for increased safetyand comfort. Ensure that your keyboard and touchpad are at acomfortable height. The screen should be about 45-70 cm (18-30inches) from your eyes.If you use your computer for long periods while sitting at a desk,invest in an external keyboard for improved comfort.