Hitachi 32PD7800, 42PD7800 Troubleshooting, Symptoms That Seemingly Appear to be Failures

Models: 42PD7800 32PD7800

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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.

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off.

 

• Press the power switch.

 

 

 

 

 

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• 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,

 

 

 

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• 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.

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played.

 

! Invalid Scan Freq.

• Check to see if the input signal matches the monitor

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specifications.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Check the way the signal cable is connected.

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• The power indicating lamp is normally lit but

 

 

 

 

 

 

• Check the contrast and brightness settings (adjust them for higher

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no picture.

 

 

 

 

 

 

contrast and brightness).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Check the way the signal cable is connected.

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• 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.)

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• Text displayed across the screen appears

 

 

 

 

 

 

(RGB input)

 

 

 

 

 

 

 

vertically streaked, with the characters in

 

 

 

 

 

 

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vertical columns blurred.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Text displayed across the screen appears

 

 

 

 

 

• Adjust the dot clock phase for the clearest viewing.

 

blurred.

 

 

 

 

 

(RGB input)

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A fine pattern flickers when displayed on

the screen.

 

 

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• The remote control does not work.

 

• Check to see if the batteries are loaded in the remote control in

 

 

 

opposite direction.

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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-

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AAAAA

 

normal position.

 

 

fication by pressing

button.

 

 

 

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• Turn off the screen saver.

 

 

 

 

 

 

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• The display has picture missing on the

 

 

 

• Turn off the screen saver.

 

 

AAAAA

 

 

screen.

 

 

 

 

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(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.

 

 

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Hitachi 32PD7800, 42PD7800 Troubleshooting, Symptoms That Seemingly Appear to be Failures, Symptom Point to check