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Troubleshooting - Hitachi CM721F - 19" CRT Display User Manual

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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 re-
fresh rate at this resolution.
Problem: Image is bouncing or in a wave pattern.
@
(Please refer to the FCC statement at the beginning of the manual for
more details on display interference.)
Move any electrical devices that may cause magnetic interference.
20

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