ViewSonic VPW4255 User Guide - Page 29

TROUBLESHOOTING Symptoms That Appear to be Failures Make the checks suggested below depending on the symptoms observed. If the symptoms remain, contact your dealer. WARNING Customer servicing can be hazardous. Symptom • No picture with the power-indicator lamp off. • The message "No Sync. Signal" or "Power Save" is displayed. • No picture with the power indicator lamp light orange. ! No Sync. Signal • The message "Invalid Scan Freq." is displayed. ! Invalid Scan Freq. Point to check • Check to ensure the power cable is connected. • Press the power switch. No sync signal is detected. • Check to ensure the signal cable is connected. • Make sure that the switch of the computer, imaging equipment , etc., is turned on. • Make sure the computer is not in the power-save mode. • Check to see if the input selection matches the connection terminal. An input signal is not being received normally. • Check to see if the input signal matches the monitor specifications. • Check to ensure the signal cable is connected. See page       • The power indicator lamp is normally lit but no picture . • The display image appears to be flowing slantwise. • Text displayed across the screen appears vertically streaked, with the characters in vertical columns blurred. • Text displayed across the screen appears blurred. • A fine pattern flickers when displayed on the screen. • The remote control does not work. • Check the contrast and brightness settings (adjust them for higher contrast and brightness).  • Check to ensure the signal cable is connected.  • Adjust the dot clock frequency and phase. (Adjust the dot clock frequency first, then the dot clock phase)  (RGB input)  • Adjust the dot clock phase for the clearest viewing. (RGB input)   • Check to see if the batteries are loaded in the remote control correctly.  • Try loading new batteries in the remote control. ViewSonic VPW4255 27