Hitachi 32PD7800, 42PD7800 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-indicating lamp		• Check the way the power cable is connected.	20
off.		• Press the power switch.
			21
• The message “No Sync. Signal” or “Power		No sync signal is detected.
Save” is displayed.	! No Sync. Signal	• Check the way the signal cable is connected.
		• Make sure that the switch of the computer, imaging equipment,
			16
• No picture with the power indicating lamp		etc., is turned on.
lights in orange.		• Make sure the computer is not in the power-save mode.

•Check to see if the input selection matches the connection terminal.

• The message “Invalid Scan Freq.” is dis-		An input signal is not received normally.	16
played.	! Invalid Scan Freq.	• Check to see if the input signal matches the monitor	55
		specifications.
		• Check the way the signal cable is connected.	56
			57
• The power indicating lamp is normally lit but		• Check the contrast and brightness settings (adjust them for higher	16
no picture.		contrast and brightness).
		• Check the way the signal cable is connected.	41
			43
• The display image appears flowing slant-		• Adjust the dot clock frequency and phase. (Adjust the dot
wise.		clock frequency first, the dot clock phase next.)	37
• Text displayed across the screen appears		(RGB input)
vertically streaked, with the characters in			52
vertical columns blurred.
• Text displayed across the screen appears		• Adjust the dot clock phase for the clearest viewing.
blurred.		(RGB input)	37

•A fine pattern flickers when displayed on

the screen.		52
• The remote control does not work.	• Check to see if the batteries are loaded in the remote control in
	opposite direction.	10

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

• The display image does not appear in the		• Check to see if the displayed input signal match the monitor speci-		16
	AAAAA
normal position.		fication by pressing	button.
				39
		• Turn off the screen saver.
				55
				56
				57
• The display has picture missing on the		• Turn off the screen saver.
	AAAAA
screen.				39
(PC input mode only)
• The temperature of the display panel surface is high.		• The plasma display panel is lighting the phosphors by the
		discharge of internal radiation. In some cases, this may cause the		–
		temperature of the panel surface to increase. Please note that this
		is not a malfunction.

50