TROUBLESHOOTING
Symptoms That Appear to be Failures
Make the checks suggested below depending on the symptoms observed. If the symptoms remain, contact your dealer.
WARNING
Customer servicing can be hazardous.
Symptom |
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• No picture with the |
| • Check to ensure the power cable is connected. | 15 | |
off. |
| • Press the power switch. | ||
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• The message “No Sync. Signal” or “Power |
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| No sync signal is detected. | 14 |
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Save” is displayed. |
| ! No Sync. Signal | • Check to ensure the signal cable is connected. | |
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| • Make sure that the switch of the computer, imaging equipment , |
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• No picture with the power indicator lamp |
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light orange. |
| • Make sure the computer is not in the |
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•Check to see if the input selection matches the connection terminal.
• The message “Invalid Scan Freq.” is |
| An input signal is not being received normally. | 14 | |
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displayed. | ! Invalid Scan Freq. | • Check to see if the input signal matches the monitor | ||
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| specifications. | 31 | |
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| • Check to ensure the signal cable is connected. | ||
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• The power indicator lamp is normally lit but |
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| • Check the contrast and brightness settings (adjust them for higher | 14 | |
no picture . |
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| • Check to ensure the signal cable is connected. | 20 |
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• The display image appears to be flowing |
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| • Adjust the dot clock frequency and phase. (Adjust the dot clock |
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slantwise. |
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| frequency first, then the dot clock phase) | 23 |
• Text displayed across the screen appears |
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vertically streaked, with the characters in |
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vertical columns blurred. |
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• Text displayed across the screen appears |
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| • Adjust the dot clock phase for the clearest viewing. |
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blurred. |
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| (RGB input) | 23 | |
• A fine pattern flickers when displayed on the |
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screen. |
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• The remote control does not work. |
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| • Check to see if the batteries are loaded in the remote control |
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| correctly. | 12 |
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| • Try loading new batteries in the remote control. |
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ViewSonic VPW4255 27
