Troubleshooting; Symptoms That Seemingly Appear To Be Failures - Hitachi CMP4221 User Manual

TROUBLESHOOTING

Symptoms That Seemingly Appear to be Failures

Make the checks suggested below depending on the symptoms observed. If the symptoms remain uncorrected, contact your dealer.
WARNING
Self servicing can be hazardous.
Symptom
There is no picture and the indicating lamp is off.
In RGB mode, the message "NO SIGNAL" is
displayed.
In Video mode, the message "NO SIGNAL" is
displayed.
There is no picture and the indicating lamp lights
orange.
The message "OUT OF RANGE" is displayed.
The indicating lamp is lit normally but there is no
picture.
The display image appears slanted.
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.
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Check to see that the power cable is properly connected.
Press the main switch.
No sync signal is detected.
Check that the signal cable is properly connected.
NO SIGNAL
Make sure that the computer, imaging equipment, etc., is turned on.
Make sure the computer is not in power-save mode.
Ensure that the input selection matches the connection terminal.
An input signal is received abnormally.
Ensure that the input signal matches the monitor specifications.
OUT OF RANGE
Check to see that the signal cable is properly connected.
Check the contrast and brightness settings (adjust them for higher
contrast and brightness).
Check to see that the signal cable is properly connected.
Adjust the clock frequency and the phase. (Adjust the clock frequency
first, the dot clock phase next.)
(RGB input)
Adjust the clock phase till the desired clarity is obtained.
(RGB input)
Ensure that the batteries in the remote control are inserted with
the correct polarity.
Check to see that the batteries in the remote control are functional.
Point to check See Page
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