
General Purpose LCD MonitorsTrouble Shooting Guide en 23
| 9 | Trouble Shooting Guide | |
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| Problem | 
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| No image is displayed on screen | – Check that the power cord of the monitor is securely connected into the | |
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 | wall outlet or grounded extension cable or strip. | 
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 | – Power switch should be in the ON position and the LED lit. | 
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 | – Check that the Brightness and/or Contrast adjustments of the display have | 
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 | not been turned down to minimum levels. | 
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| “Check Input Signal” message is | – The signal cable should be completely connected to the video card/ | |
| displayed in PC mode | computer. | |
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 | – The video card should be completely seated in its slot and the computer | 
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 | switched ON. | 
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| Display image is not centered, is | Push the down key to activate the Autoset function. | |
| too small, or too large in the PC | 
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| mode | 
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| Vertical or horizontal noise is | Adjust the Clock and Phase in the OSD submenu. | |
| present in the picture in PC mode | 
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| Incorrect colors | 
 | – Press the Menu button on the front panel of the monitor, then press the | 
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 | right arrow to select the Color menu. Press the down arrow on the front | 
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 | panel and select 9300K or 6500K. | 
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 | - or - | 
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 | – Press the Menu button on the front panel of the monitor, then press the | 
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 | right arrow to select the Utility menu. Press the down arrow on the front | 
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 | panel and select Recall to reset to the default settings. | 
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| The error message “Unsupport | PC is operating with either a resolution or timing mode that is not supported. | |
| Mode” is displayed | 
 | Change the PC timing mode to one of the valid combinations below: | 
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 | Timing mode | 
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 | 640 x 480; 60/72/75 Hz | 
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 | 800 x 600; 60/72/75 Hz | 
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 | 1024 x 768; 60/70/75 Hz | 
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 | 1280 x 1024; 60/75 Hz (17 and 19 inch only) | 
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| Bosch Security Systems, Inc. | User’s Manual | F.01U.127.338 2.0 2009.05 |