Hitachi CM721F User Manual - Page 21

TROUBLESHOOTING The following are solutions to common installation problems. If the symptom remains after trying the suggested solutions, please contact HITACHI technical support or refer to www.hitachidisplays.com for additional service and support information. Problem: Power LED is not lit when monitor is powered on. @ Check to make sure that the power cord is properly connected. @ Make sure that the extension cord or the surge protector is turned on if the monitor is plugged into a power extension cord or a surge protector. Problem: No display appears on screen. @ Make sure that the computer switch is in the "On" position. @ Make sure that the video cable D-shaped connector is properly con- nected to the video adapter port on the back of the PC. @ Check to make sure that the brightness and contrast controls are not turned to their dimmest position. Problem: Display image is either flickering or unstable. @ Make sure that the video cable's D-shaped connector is properly con- nected to the video adapter port on the back of the PC @ Check the refresh rate and driver on your PC. Increase the refresh rate to 70 or 75 Hz ONLY if your monitor manual states it can attain this refresh rate at this resolution. Problem: Image is bouncing or in a wave pattern. @ Move any electrical devices that may cause magnetic interference. (Please refer to the FCC statement at the beginning of the manual for more details on display interference.) 20