Hitachi CMP4121HDU user manual Troubleshooting, Symptoms That Seemingly Appear to be Failures

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	• Customer servicing can be hazardous.
Symptom			Point to check	See
				page
• No picture with the power-			• Check the way the power cable is connected.	6
indicating lamp off.			• Press the power switch.	7
				9
• The message “POWER			No sync signal is detected.	6
SAVE” is displayed.			• Check the way the signal cable is connected.
		POWER SAVE	• Make sure that the switch of the computer,	7
• No picture with the power			imaging equipment , etc., is turned on.	9
			• Make sure the computer is not in the power-save
indicating lamp flickering in
			mode.	10
green.
			• Check to see if the input selection matches the	21
			connection terminal.
				28
• The message “OUT OF			An input signal is not received normally.	6
FREQUENCY” is displayed.			• Check to see if the input signal matches the	7
		OUT OF FRQUENCY	monitor specifications.
			• Check the way the signal cable is connected.	21
• The power indicating lamp is			• Check the contrast and brightness settings	6
normally lit but no picture .			(adjust them for higher contrast and brightness).	7
			• Check the way the signal cable is connected.
				11
				13
• The display image appears			• Adjust the dot clock frequency and phase.	15
flowing slantwise.			(Adjust the dot clock frequency first, the dot clock	16
• Text displayed across the			phase next.)
screen appears vertically			(RGB input)	25
streaked, with the characters
in vertical columns blurred.
• Text displayed across the			• Adjust the dot clock phase for the clearest	15
screen appears blurred.			viewing.	16
• A fine pattern flickers when			(RGB input)
displayed on the screen.				26
• The remote controller does not work.			• Check to see if the batteries are loaded in the	8
			remote controller in opposite direction.

•Check to see if the batteries in the remote controller are OK.

ENGLISH

23