Acer X233H User Manual - Page 4

X233H Product servicing Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage points or other risks. Refer all servicing to qualified service personnel. Unplug this product from the wall outlet and refer servicing to qualified service personnel when:  the power cord or plug is damaged, cut or frayed liquid was spilled into the product  the product was exposed to rain or water  the product has been dropped or the case has been damaged  the product exhibits a distinct change in performance, indicating a need for service  the product does not operate normally after following the operating instructions Note: Adjust only those controls that are covered by the operating instructions, since improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to normal condition. LCD Pixel Statement The LCD unit is produced with high-precision manufacturing techniques. Nevertheless, some pixels may occasionally misfire or appear as black or red dots. This has no effect on the recorded image and does not constitute a malfunction. Tips and information for comfortable use Computer users may complain of eyestrain and headaches after prolonged use. Users are also at risk of physical injury after long hours of working in front of a computer. Long work periods, bad posture, poor work habits, stress, inadequate working conditions, personal health and other factors greatly increase the risk of physical injury. Incorrect computer usage may lead to carpal tunnel syndrome, tendonitis, tenosynovitis or other musculoskeletal disorders. The following symptoms may appear in the hands, wrists, arms, shoulders, neck or back:  numbness, or a burning or tingling sensation  aching, soreness or tenderness  pain, swelling or throbbing  stiffness or tightness  coldness or weakness If you have these symptoms, or any other recurring or persistent discomfort and/or pain related to computer use, consult a physician immediately and inform your company's health and safety department. The following section provides tips for more comfortable computer use. Finding your comfort zone Find your comfort zone by adjusting the viewing angle of the monitor, using a footrest, or raising your sitting height to achieve maximum comfort. Observe the following tips:  refrain from staying too long in one fixed posture  avoid slouching forward and/or leaning backward  stand up and walk around regularly to remove the strain on your leg muscles  take short rests to relax your neck and shoulders  avoid tensing your muscles or shrugging your shoulders  install the external display, keyboard and mouse properly and within comfort able reach  if you view your monitor more than your documents, place the display at the center of your desk to minimize neck strain EN- 3